View allAll Photos Tagged Absorption
789, Beijing
July 2012
China
Nothing like a giant transformer to lay your head to rest against when tired
Ricoh GR Digital IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely I will probably say yes, just ask me first!
If you happen to be in one of my frames and have any objections to this.
Please contact me!
Please no glossy awards, scripted comments and big thumbnails back to your own work.
I will remove them..
"Date: 2010. Artist: Ulrike Koch-Brinkmann. Medium: Polymethyl metacrylate.
"This richly decorated statue stood on the tomb of a girl named Phrasikleia. She wears a crown of lotus buds and holds a single bud in her left hand. The epigram on the base tells us that she died young, before she could marry.
The famous sculptor Aristion of Paros signed the work. With the help of ultraviolet-visible absorption spectroscopy (UV-Vis spectroscopy) and X-ray fluorescence spectroscopy (XRF), traces of a numbers of colors on the flesh and clothing could be identified: red and brown madder, red and brown ocher, lead white for the eyes, flesh, and hair, as well as three different reds and yellows (red and yellow iron oxide and orpiment for the garment). Wherever the underside of the fabric is visible - on the sleeve and the lower hem - a dark red pigment (hematite) was deliberately used. Gold leaf and lead tin foil that gleams like silver were applied to the dress and the jewelry.
Metal rosettes and shiny yellow swastikas (painted with orpiment and gold ocher) were scattered over the entire garment. Additionally, stars appear on the back of the garment, evidently intended to represent a constellation.
The reconstruction made in 2010 follows the incised patterns and colors that were identified by scientific analysis. But after the latest discoveries by the conservators in the Athens National Museum, the red ocher of the robe has been mixed with cinnabar, giving the color an even more intense effect. The polish of the skin was based on contemporary Egyptian mummy portraits and was
done using agate, while a shimmering lacquer (gum arabic) was applied to the irises of the eyes. In 2019, gilding was added to the volute ornament of the belt and precious stones were inserted into the round depressions that are still preserved."" - info from the Met.
"The Metropolitan Museum of Art of New York City, colloquially "the Met", is the largest art museum in the Americas. Its permanent collection contains over two million works, divided among 17 curatorial departments. The main building at 1000 Fifth Avenue, along the Museum Mile on the eastern edge of Central Park on Manhattan's Upper East Side, is by area one of the world's largest art museums. A much smaller second location, The Cloisters at Fort Tryon Park in Upper Manhattan, contains an extensive collection of art, architecture, and artifacts from medieval Europe.
The Metropolitan Museum of Art was founded in 1870 with its mission to bring art and art education to the American people. The museum's permanent collection consists of works of art from classical antiquity and ancient Egypt, paintings, and sculptures from nearly all the European masters, and an extensive collection of American and modern art. The Met maintains extensive holdings of African, Asian, Oceanian, Byzantine, and Islamic art. The museum is home to encyclopedic collections of musical instruments, costumes, and accessories, as well as antique weapons and armor from around the world. Several notable interiors, ranging from 1st-century Rome through modern American design, are installed in its galleries.
The Fifth Avenue building opened on March 30, 1880. In 2021, despite the COVID-19 pandemic in New York City, the museum attracted 1,958,000 visitors, ranking fourth on the list of most-visited art museums in the world.
New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over 300.46 square miles (778.2 km2), New York City is also the most densely populated major city in the United States. The city is within the southern tip of New York State, and constitutes the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area – the largest metropolitan area in the world by urban landmass. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous megacities, and over 58 million people live within 250 mi (400 km) of the city. New York City is a global cultural, financial, and media center with a significant influence on commerce, health care and life sciences, entertainment, research, technology, education, politics, tourism, dining, art, fashion, and sports. New York is the most photographed city in the world. Home to the headquarters of the United Nations, New York is an important center for international diplomacy, an established safe haven for global investors, and is sometimes described as the capital of the world." - info from Wikipedia.
The fall of 2022 I did my 3rd major cycling tour. I began my adventure in Montreal, Canada and finished in Savannah, GA. This tour took me through the oldest parts of Quebec and the 13 original US states. During this adventure I cycled 7,126 km over the course of 2.5 months and took more than 68,000 photos. As with my previous tours, a major focus was to photograph historic architecture.
Now on Instagram.
Processed using calibrated near-infrared methane absorption band (CB2, MT2, MT3) filtered images of Saturn taken by Cassini on November 27 2012.
NASA/JPL-Caltech/SSI/CICLOPS/Kevin M. Gill
Zaahr - in Black * Zaahr - Facebook
SOOC image.
Raganuga - Absorption in Pure Love
Gracias a todos por los amables comentarios, mi amigos/as!
Thank you for all your kind comments, my friends!
FOV: 6" wide.
This experiment was an attempt to recreate the fluorescence of chromium activated corundum (aka 'ruby'). Aluminum hydroxide was mixed with 1-4 drops of Cr(III) oxide in a basic solution. This was placed on a small amount of aluminum sulfate in an aluminum foil container and a bit of water was added.
The sample was then heated, first with a propane torch until the water was removed and then with a MAPP gas torch until the aluminum sulfate expanded into foam, trapping the aluminum hydroxide which was calcined into aluminum oxide by the torch's flame. (at least that was the plan)
Shown also is a natural ruby from Mysore, India.
See ruby excitation spectrum here (0.03% Cr):
www.northropgrumman.com/BusinessVentures/SYNOPTICS/Produc...
Contains:
Ruby (FL Red >GR,BL/UVa)
Ruby Foam (FL Red >GR,BL/UVabc)
Shown under UVa light.
Key:
WL = White light (halogen + LED)
FL = Fluoresces
PHOS = Phosphorescent
BL = 450nm, GR = 532nm
UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)
'>' = "stimulated by:", '!' = "bright", '~' = "dim"
Ruby2
24 Dec 2016
Series best viewed in Light Box mode using Right and Left arrows to navigate.
Photostream best viewed in Lightbox mode (in the dark).
18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps
For testing on film my newly arrived exceptional French 35mm camera FOCA Universel RC (see below for details about this rare and fascinating camera), I went for photowalk in my district, Lyon, France. The weather was very sunny and the outside temperature warm (32°C).
Testing a new collection camera is always is great moment. We know the camera only from its blank manipulations but the real judge is the test film on the field, the camera exposed to outside elements in real photography operations. Some possible problems as light leaks or slight unpairing of the shutter curtains, will be only detected on film.
I used the camera with its ever-ready bag and I removed the front part for operation. In particular, I previously checked very carefully the exact condition of the thin leather neck strap. Old leather may crack and it would a shame and a nightmare to drop such camera. The OPLAR standard lens 1/:2.8 f=5cm was equipped with a yellow filter FOCA x2.5. The OPLAR lens fro the FOCA’s only accept push-on filter (42.5mm in this specific case). A vintage Genaco cylindric stainless-steel shade hood conceived for a 5cm focal length was also used all along the session.
The test film was a 36-exposure Fomapan 100. Expositions were determined for 50 ISO to compensate the absorption of the yellow filter. Metering was achieved using a Minolta Autometer III lightmeter fitted with a 10° finder for selective metering privileging the shadow areas.
View Nr 34: 1/50s f/4 focusing @ 3 m - Yellow filter
Collection car Volvo P1800, July 5, 2025
Boulevard de la Croix Rousse
69004 Lyon
France
After completion at view #39, the film was rewound normally and processed using 350 mL of Adox Adonal developer (identical to the original Agfa Rodinal in its formula of 1891) prepared at the dilution 1+50 for 9 min at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) fitted to a Minolta Auto Bellows III with the Minolta slide duplication accessory and Minolta Macro Bellow lens 1:3.5 f=50mm. The diffuse light source was a LED panel CineStill Cine-lite.
The RAW files obtained were inverted within the latest version available of Adobe Lightroom Classic (version 14.4) and edited to the final jpeg pictures without intermediate file. They are presented either as printer files with a frame or the full size JPEG's together with some documentary smartphone color pictures.
As a result, the test film shows that this FOCA Universel RC is in perfect conditions and could be used normally with confidence.
About the camera and its history :
Among the French 35mm camera produced by « Optique & Précision de Levallois S.A. » from 1945 to the middle of the 60’s, the FOCA Universel « RC » is likely the most captivating ever produced in France at that time.
The camera was the last development of the FOCA, sometime called the « French Leica » because the optical and mechanical precision matched and even surpassed the original thread-mount Leica. Far before the first Leica M (the M3 in 1954) O.P.L. developed a bayonet-mount FOCA in 1948 called the FOCA « Universel ». Seeing the incredible viewer and range finder of the Leica M that is likely the most sophisticated system even engineered, O.P.L. released lately a great improvement of the FOCA with a novel collimated, parallax auto-corrected, of a fully original and different design of the Leitz system.
The FOCA Universel RC It is a rare camera that only appears for time to time on the collector market, being only produced to a bit more than 2000 overall units in the years 1962 and 1963, just before O.P.L. decided to quit the camera production and returned to other instrumental optical production. O.P.L. soon merged with SOM Berthiot and today can be found still in the industrial filiation of SAFRAN group, the French leader company for designing and producing system for aerospace appliances. The plant where the FOCA's were produced still exists in an almost original form in Châteaudun, Eure-et-Loir, France.
I got my first FOCA URC unit two years ago (Sept. 2023, flic.kr/s/aHBqjAV6Dg) that is a standing and emotional piece of my small camera collection.
I got this one from an apparently ignored auction on the French eBay. We were only two biders in the last 5s and I won the auction not far away to the initial price. The camera was fully revised, with new shutter curtains, a new delayed shutter release mechanism. The serial number indicated a year-1962 production starting with 1.000.000, closed to my first FOCA URC. The camera works in every functions like on its Day-1! The camera came with a late version 1962 of the OPLAR 1:2.8 f=5cm standard collapsible lens of excellent quality, the FOCA UCR dedicated ever-ready leather bag with the original leather neck strap in good condition.
The original O.P.L. camera warranty and a registration postal card fortunately followed the life of the camera, indicating that this beautiful FOCA Universel RC was sold to its first owner on August 9, 1963 by the official FOCA dealer « ROYAL-PHOTO, Photo-Ciné-Magnétohone », 42, rue Vignon, Paris 9ème arrondissement, France, today a Weill fashion shop at the same address. The address of the owner also still exists with the original Parisian building in place, Boulevard Poniatwski, next to the Métro station « Porte de Charenton », Paris 12ème arrondissement.
The shown original FOCAL Universel RC user manual is the one that came with my other FOCA URC camera.
These information pushed me to question what were the news in France on this Friday, August 9, 1963… France was mainly on vacation, by an exceptional wet and fresh weather that wasted many French citizens holidays. The whole national radio information bulletin is still available online here :
www.ina.fr/ina-eclaire-actu/audio/phd94020557/inter-actua...
Inter actualités de 7:15 PM du 9 août 1963
Inter actualités de 7:15 PM - 09.08.1963 - 29:58 - audio
Ina.fr (English translated)
- Headlines - Jean-Pierre ELKABBACH: The Marseille and Bordeaux sailors' strike ended this morning, but nothing has been resolved in Le Havre. Many heads of state and government sent messages of condolence to President Kennedy for the death of his third child shortly after birth. Other headlines in the newspaper (2'20"). - André Brière: It does not appear for the moment that work will resume in Le Havre. Mr. Pisani would agree to the distillation of 2 million hectoliters of wine, which is clogging up the market, but a subsidy would be required. Discontent is growing among winegrowers in the south, whom the population accuses of various acts of sabotage in the Narbonne region. Complaints from winegrowers in the southwest. Farmers scattered 5 tons of potatoes yesterday in the streets of Douai (3'30"). - Jacques Behingue: Secretary of State Dean Rusk will return to Washington from Moscow on Monday. He will give a presentation to senators on the Moscow Treaty. This morning, Dean Rusk was received by Mr. Khrushchev on the shores of the Black Sea in Cagra. This evening, Mr. Dean Rusk will host a dinner in Moscow at the US Embassy. Tomorrow, he will be in Bonn, received by Mr. Adenauer. The Moscow Treaty was signed by 11 new countries, with Japan set to sign next Wednesday. North Vietnam has refused to sign. Mr. MAC MILLAN declared that underground tests, which are not prohibited, are not of great importance because nuclear weapons can only be modified following atmospheric tests (4'40"). - Gérard TAVERA: Two years after Bizerte, France and Tunisia signed an agreement this morning that includes two chapters: the first concerns the 30,000 Tunisian workers living in France, the second concerns economic cooperation. This agreement resolves the economic problems concerning Bizerte. After an African trip, Mr. BEN BELLA returns to Algiers. In Accra, Mr. BEN BELLA declared that the next session of the UN would be an African session. Yesterday, AIT AHMED violently criticized the FLN party and the constitutional project. All French newspapers reproducing Mr. AIT AHMED's Declaration were seized this morning upon their arrival in Algiers. Since July 16, in Morocco, leaders of the UNFP are detained in rather precarious conditions following the "plot" against the monarchy (2'25"). - André Brière: before the State Security Court, opening of the trial of the station commander, among those who are bringing a civil action is Mr. Jean OUDINOT, former director of RTF in Algiers (1'05"). - Victor VRAMANT: the body of Doctor WARD was cremated this morning, only members of Doctor WARD's family attended the funeral ceremony. The weather in France and Europe. It is raining everywhere in France except on the Côte d'Azur. Road accidents (2'). - Jean-Pierre ELKABBACH: Gaston GELIS, former director of "Paris-journal" died in a road accident in Seine et Marne (1'). - Victor VRAMANT: a major drug trafficker was arrested at Orly. In Italy, following the arrest of a repeat offender, a 22-year-old American woman was arrested for drug trafficking (1'30"). - Jacques CHABOT: Charles TRENET has not yet been released; he would be released tomorrow morning after payment of bail (25%).
WEATHER:
SOURCE: www.meteo-paris.com/chronique/annee/1963
June 14, 1963: a particularly cool day - it was no more than 12°C in Rouen, 13°C in Paris, St. Quentin, Lille, Le Havre, and Caen.
August 1963 was autumnal because it was very cool and very wet. On August 3, 1963, torrential rains caused catastrophic flooding and the death of eight people in the Lyon region. On August 4, 1963, 400 houses were also flooded between St. Jean de Luz and Le Boucau (Pyrénées Atlantiques). On August 17 and 18, 1963, it was no more than 10°C. and 15°C in the northern half - many summer visitors leave early - it's snowing in the mountains and the harvest is very difficult.
Historical landmarks of the year 1963
August 28, 1963: Martin Luther King leads the march on Washington. October 11, 1963: Jean Cocteau and Edith Piaf die within hours of each other. November 22, 1963: President J.F. Kennedy is assassinated in Dallas. The yé-yé movement is in vogue - the debut of Françoise Hardy and the politically engaged singer, Jean Ferrat.
Bows and flows of angel hair, and feathered canyons everywhere. (Neil Diamond) The Cone Nebula is located 2,700 light years away in the constellation Monoceros. The cone's shape comes from a dark absorption nebula consisting of cold molecular hydrogen and dust in front of a faint emission nebula containing hydrogen ionized by S Monocerotis, the brightest star of NGC 2264. The faint nebula is approximately seven light-years long.
The horizontal Christmas Tree cluster lies left of the cone; the bright star immediately left of the cone is the tree topper and the very bright star near the center of the image is the center of the tree trunk. The Fox Fur Nebula is at the top center.
The Christmas Tree star formation consists of young stars obscured by heavy layers of dust clouds. These dust clouds, along with hydrogen and helium are producing luminous new stars. The combination of dense clouds and an array of colors creates a color map filled with varying wavelengths. The red regions are ionized hydrogen, while the bluish clouds are ionized oxygen.
Scope: Skywatcher MN190; Camera QSI 683; Mount MYT
This is a false color HOO image (though approximately correct) composed of Ha 9 hours, Oiii 9 hours
To reprocess this image I used a relatively new technique called dynamic color combination, found at: thecoldestnights.com/2020/06/pixinsight-dynamic-narrowban...
Reprocessed December 2023
In V4 I tried to improve the stars, the overall color balance, and to bring up the brightness in the dimmer areas.
A couple weeks ago I posted on the difficulties of spotting Oophaga lehmanni in the wild, and its threatened status (www.facebook.com/paul.bertner/posts/1954323497983506). After deliberating for a week, while cooped up with the flu and a sprained finger, and rummaging online for records of O. lehmanni, I was struck not only by the overall dearth, but by the almost complete lack of 'in situ' images, with not a single one illustrating behaviour or a decent representation of the environment. For a critically threatened species, one whose risk of extinction is quite high, this to me represented a tremendous oversight. Though I'd already tried and failed to capture some behaviour shots on a short previous expedition, I decided to dedicate a week to the endeavour, if for no other reason than to have a record befitting such an elegant species.
Travelling to the same site as before, I settled in to photograph calling behaviours. Setting aside a week to get this rather modest shot was giving myself quite a lot of latitude I thought...I was wrong. Three days in and I had little to show for my efforts, resorting to shooting at 300mm + 1.4X TC, I was still struggling to surprise this elusive gem. Though I could hear the frogs calling, and could even see them doing so, creeping up on them and getting a respectable photo was proving an altogether different kind of a problem.
I tried remote shooting (however they rarely returned to the same perch, causing the framing to be off), I tried hides (though after waiting 2-3hrs in mosquito infested areas with the slightest movement causing the frogs to go diving back into root tangles proved frustrating to say the least). Nothing seemed to work, and I was beginning to despair.
This begged the question, "Why would a poisonous species which supposedly has no known predators be so timid?" The answer somewhat surprised me, "researchers". Apparently the frequent capture-release monitoring of the local populations has resulted in a rather poignant behavioural change. A species which would otherwise be fearlessly hopping the rainforest understory has had its buzzing call muted. It was a potent reminder of our influence on the natural world, whether it represents a kind of Schroedinger's cat problem, in which our very observation and monitoring of a species ultimately impacts its natural behaviours, or whether it's something more intrusive or sinister like manipulation for an aesthetic image or poaching, respectively.
We have to go further in I told the guide. And so we walked, and we walked and still the frogs fell silent at the sound of our approaching footfalls. 6 hours later, 2 of which we left the already weedy trail completely to bushwhack, and we came to a spot where we crept up upon a calling frog. It continued its buzzing call despite undoubtedly having already seen us. I made sure to shoot without flash and with a long lens to prevent any kind of potential habituation/aversion. Moments later a second male appeared from behind a leaf and they immediately began to wrestle. They flipped one another repeatedly, interspersed with calls. Rather evenly matched, this went on for almost 15 minutes. Finally the victor held his ground, whilst the vanquished retreated from the hallowed ground.
Upon reviewing the photos and videos, I felt privileged to have witnessed such a behaviour from a vanishing species. This is perhaps even truer than I'd originally thought, the two males despite their verisimilitude actually appear to be different species/sub-species. While one has all the characteristics befitting O. lehmanni, the other whose white fingertips, slightly broadened head and differing banding patterns indicates some degree of hybridization with the very closely related Oophaga histrionica. Perhaps extinction will not come in the form of habitat loss or extinction (though harbour no illusions that this undoubtedly plays its role), but through hybridization, and its absorption into a larger more robust population. To purists and hobbyists this would still represent a tragedy, though perhaps it's a gentler swan song, a muting of a call rather than its abrupt silencing.
Photos from the Cauca Valley, Colombia.
pbertner.wordpress.com/ethical-exif-ee/
---------------------
EE Legend
-Health injury/stress levels (scale 1-10-->☠️)
👣-Translocation
⏳-time in captivity
📷 -in situ
- Manipulated subject
🎨 -Use of cloning or extensive post processing
↺ -Image rotation
LEVELS OF ABSORPTION, 2004 by LAURA MAYOTTE
36”w x 20 1/2”h x 16”d
Handmade flax paper, handspun and dyed linen yarn, indigo dye.
Artist’s Statement
Levels of Absorption holds many meanings for me. Literal meanings, such as the actual absorption of the indigo dye on the pages and watermarks, and abstract meanings, such as (being a book form) how much knowledge we absorb over a lifetime, the fact that we never make use of our entire brain, that there is always room for more knowledge, learning and growth, and that also the tree-like shape adds to this idea of growth over time. All the sewing reflects the pathways of the brain and how we think; how everything is connected, how odd things can remind us of seemingly unrelated things, but they are all there and accessible. This sewing is also rather electricity-like in appearance, and metaphorically, referring to how fast our thoughts can be, our natural reflexes or responses to stimuli, and how knowledge gained over time can be instantly accessed once learned.
"Did I ever tell you the definition of insanity?"
The Reisen is an upgraded version of the M4 and M16 assault rifles. With new firing mechanics, this modification solved many of the performance issues with the old weapon systems. This carbine also comes with adjustable scope and Einzbern Recoil Absorption Stock (ERAS).
Explore #496—my first photo to make Explore! Thanks guys!
My favorite Ansel Adams photograph is "Clearing Winter Storm," and so I was desperately hoping for a storm when I visited Yosemite (even though I knew I'd never get a photo as good as Ansel's as I'm not that talented!). Luckily, on the third day, this storm rolled in and brought a ton of fog with it. The fog was pouring down El Capitan like waterfalls and spiraling through the trees on the valley floor. The view was so amazing I shot five rolls of film of the changing views, plus a few shots with the digital camera for some instant gratification. This is one of the digital shots; the film shots will be scanned over the next couple of days as there are a TON of rolls of film from the trip and developing and scanning them takes awhile...
©2010 Tanya Harrison, all rights reserved. Do not reproduce or re-distribute without permission.
The absorption of Robson’s into the United Glass Group in 1980 saw a strong phase of buying Scanias, a marque favoured by the United Group. A121 JLS Border Rebel was the first three-axle tractor unit in the Robson’s fleet. This tag-axle 6x2 was used on short-haul tipper work carrying ten loads a day of specialist silica sand used for glass-making. It may have been fitted with a day cab rather than the sleeper version depicted here (25-Oct-18).
All rights reserved. For the avoidance of doubt, this means that it would be a criminal offence to post this image on Facebook or elsewhere (please post a link instead). Follow the link below for terms and conditions, additional information about my work; and to request work from me:
www.flickr.com/photos/northernblue109/6046035749/in/set-7...
Cumberland MS, ex Kelvin Scottish
Leyland National
218 (OLS 809T)
Whitehaven depot 8/88
BKP
Painted in Yeowart's livery for use on former Yeowart's services, after absorption of that operator by Cumberland MS.
Sprinter Leiden CS - The Hague CS
February 2013
On my new blog thecovertphotographer.wordpress.com i will be providing some background to some of my pictures. Here is the story that goes along with this particular shot: thecovertphotographer.wordpress.com/2013/02/19/rush-hour/
Candid shots in and around Public Transport
Ricoh GRD IV
“Light and dark, dry and wet, reflective and absorptive, these qualities give the different multiples of the painting a distinct visual rhythm. (…) The rhythms change with the light and with the position and movements of the viewer.”
Winston Roeth
April 2012
The Netherlands
Candid shots in and around the Public Transport in The Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely I will probably say yes, just ask me first!
If you happen to be in one of my frames and have any objections to this.
Please contact me!
Please no glossy awards, scripted comments and big thumbnails back to your own work.
I will remove them...
All rights reserved
pls keep the comments clean.
no banners & awards pls!
© All rights reserved. Use without permission is illegal.If you do so you will be sued!!!
Took a waterproof colour card on a dive and took photos at two different depths as can be seen by the reading on my old decompression computer. Shows vividly how colours are absorbed underwater and that red is the first to go.
See how the red looks totally black at nearly 20m depth.
Both pictures natural light with no white balance correction.
This photo is really just meant to be informative and educational for those that are curious about the Universe, and want to know how things work. As photographers we capture Photons after all, so here is a bit of the Physics behind the light that we love to capture.
This image shows the Electromagnetic Spectrum of light from the Sun, after traveling through Earth's blue Nitrogen rich skies (photographed through a Quantitative Spectroscope).
The nanometer scale in the Spectroscope shows the wavelengths of visible light, that range from 400 nm - 700 nm. Invisible light at shorter wavelengths (beyond violet) include Ultraviolet (UV), X-Ray and Gamma Ray. Longer wavelengths of light (beneath red) include Infrared, Microwave and Radio Waves.
About the Sun:
The Sun is a G-type Main-Sequence Yellow Dwarf (G2V) Star. Through the process of fusion, the Sun burns approximately 600 million tonnes (metric tons) of Hydrogen each second, turning it into 596 million tonnes of Helium. As the Hydrogen nuclei fuse, Photons are emitted, which in short is why the Sun shines (and all the other stars). The Hydrogen Atom is the simplest and most abundant element in the Universe (with only 1 Proton and 1 Electron).
Through the process of fusion, more complex elements are made at different stages of a star's life and death cycle. This is what Carl Sagan meant with one of his well known quotes from Cosmos, “The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.”
The Sun is roughly 150,000,000 km from Earth. The speed of light is 300,000 km/sec (186,000 miles/sec), which means that the light took just over 8 light-minutes (8 minutes and 26 seconds) to reach the Spectroscope in front of my camera lens.
Here is a very simplistic explanation of Spectroscopy, and how the Electromagnetic Light Spectrum is used in Astrophysics:
This image was photographed through a basic "High School Science Classroom" Quantitative Spectrometer (100 line resolution). With higher resolution Spectrometers on Telescopes, Astronomers can determine what chemical elements Stars and Planets are made of, as each chemical element has a unique light absorption fingerprint, that shows up as dark lines in the spectrum.
The amount that the absorption lines are shifted to red or blue (redshift and blueshift), is due to the Doppler effect and gives an indication if the celestial object is moving towards or away from us, and at what speed. This is how Scientists and Physicists know what the observable Universe is made of, and that the Universe is expanding.
More Info:
en.wikipedia.org/wiki/Spectral_line
en.wikipedia.org/wiki/Fraunhofer_lines
www.space.com/25732-redshift-blueshift.html
science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html
Interested in Science, Physics & Astronomy?
Visit my Flipboard with lots of interesting articles:
flipboard.com/@mheigan/brain-food
Martin
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This post gives a description of the sky during 'The Blue Hour' some 26 minutes before winter sunrise in Scotland. This is representative of periods during the Arctic winter to which the reindeer have adapted their vision to optimise the ability to feed and survive predation during the long winter twilight north of 60° latitude.
The image shows the reflective mirror (tapetum lucidum) revealed during the dissection of an eye from an animal during the regular cull of animals in northern Norway by the Sámi reindeer herders. The tapetum changes from a golden-turquoise colour in summer to a rich blue in winter.
The photograph of the sky https://www.flickr.com/photos/190452030@N06/52638473207/ was taken by Tom Fosbury in January this year (2023) and illustrates the physical mechanisms responsible for the intense blue environmental light that triggers this seasonal adaptation.
A Commentary on the Colour of the Pre-dawn Twilight Sky
For a direct link to the photo, see the comment below this text.
Looking towards the southwest from Cairngarroch before the winter sunrise, Tom's photograph of light snow-cover in the pre-dawn twilight provides a masterclass in the study of the formation of the colours of the sky.
With the yet-to-appear Sun over your left shoulder, the sky above the shallow peak called Millfore (656m) is beginning to show the familiar pale blue of the clear daytime sky above the pale yellow horizon that precedes sunrise. This is the pure blue produced by the Rayleigh scattering of sunlight by air molecules, mostly of them nitrogen. Unlike many natural pigment colours, this Rayleigh blue carries no hint of purple and demands that the artist chooses a colour that provides this hue.
As we traverse to the top right of the picture, the blue deepens to a fundamentally different hue that perfectly justifies the use of ultramarine pigment made from ground and purified lapis lazuli. This much prized and very costly material was used by Titian to such effect in his Bacchus & Ariadne (1520-3) with the starry sky in the top left of his painting giving the hint that scene is lit by twilight. Titian learned, from his pigment advisor Cennino Cennini, that: "Its hue is that which marks the transition from dusk to night, with a purple tint to enhance its majesty."
The remarkable property of this photograph is that it so beautifully illustrates the transition between these two blues that are entirely different in their physical origin. The "Blue Hour" ("l'heure bleue"), so favoured by painters around the turn of the 19th – 20th centuries, is now known (Hulburt, 1953) to be the result of the absorption of horizon-grazing sunlight by ozone in a layer between about 12 and 40 km altitude. With its long tangential passage through the atmosphere, much of the yellow-orange region of the solar spectrum is removed by the 'Chappuis' absorption band that results in the continuous destruction of the ozone gas by causing this rather unstable molecule to furiously vibrate and self-destruct.
Fortunately for us, the sunlight also stimulates the formation of new ozone at almost exactly the same rate. If it did not, life on the surface of the Earth would shrivel under a rain of deadly ultraviolet photons. We live under a fragile shield of ozone gas that we nearly destroyed last century with leaking refigerators and air-conditioning systems.
It is not widely appreciated that that atmosphere provides us with the delight of two entirely different blues. One of the reasons that we are not so aware of this is that our vision changes dramatically during the passage of twilight. As the sky dims at sunset (or brightens at sunrise), we switch from our 'cone' photoreceptors, whose (usually) three types give us daytime colour vision, to our more sensitive 'rods' that are tuned to blue/green light but give us no colour perception. The remarkable blue of deep twilight when the Sun is below the horizon is well captured by modern digital cameras that are both sensitive and can be made to control their colour balance (white balance) to avoid automatic colour-correction that would unwittingly compensate for the real ozone-blue.
One of the most remarkable animal visual adaptations to the extreme blue of twilight is seen in Arctic reindeer (caribou) that live and feed for about 10 hours a day in the twilight conditions of winter. These animals seasonally and reversibly change the reflected colour from the mirror behind their eyes (the tapetum lucidum) to match the spectrum of the winter sky (Fosbury and Jeffery, 2022).
The Chappuis band of ozone is the strongest indicator of oxygen that we may see in the visible spectrum of transiting exo-planets as an indicator of the presence of oxygen and the possibility of life.
This activity on the sky is reflected in the snow-dusted landscape with the lighter patches reflecting the brightening eastern horizon while the apparently shaded regions reflect the deep, metallic ozone blue of the western sky and the Earth shadow. The fresh snow has a very high albedo due to the efficient Lambertian scattering of light from myriads of tiny ice crystals.
This whole photograph is suffused with a mixture of colours derived from the two dominant physical mechanisms that paint the sky: scattering and molecular absorption.
References
Hulburt EO. 1953 Explanation of the brightness and color of the sky, particularly the twilight sky. J. Opt. Soc. Am. 43, 113–118. (doi:10.1364/JOSA.43. 000113) opg.optica.org/josa/viewmedia.cfm?uri=josa-43-2-113&s... (unfortunately not open access, but see the book: "Why the Sky is Blue" by Götz Hoeppe, Princeton University Press, English translation 2007, for an excellent explanation of the nature of ozone absorption in the atmosphere.)
Fosbury Robert A. E. and Jeffery Glen 2022 Reindeer eyes seasonally adapt to ozone-blue Arctic twilight by tuning a photonic tapetum lucidum Proc. R. Soc. B.2892022100220221002
doi.org/10.1098/rspb.2022.1002
Appendix: Image and location geometry
The image was exposed at 2023-01-20 07:57 UT at a location in Dumfries & Galloway called Cairngarroch.
Lat: 55° 04' 12" N, Long: 4° 21' 54" W at an altitude of 548 m
The broad, shallow peak visible at the left side of the image at a bearing (cw from N) of around 210°, consists of a high point (Millfore, 656m) at 2.6km with a 2 km ridge dropping slowly to the southwest for a further 2 km. The photo covers an azimuth angle of 74° from approximately S to WSW.
Using the spreadsheets available from gml.noaa.gov/grad/solcalc/calcdetails.html, we can calculate the solar position at the time of the photograph. The solar elevation (at sea level) was then -4.5° and the azimuth was 119° which results in an irradiance on a horizontal surface about 1/15 of that at sunrise.
At the camera altitude above sea level of 550m, the zenith distance of the Sun at sunrise can be calculated using the the approximate formula given in the Explanatory Supplement to the Astronomical Ephemeris, HM Stationery Office (1961), p401:
zd_Sun = 90° 50' + 2.08 * √h(m)
= 91° 39'
where h is the altitude of the camera in metres. Using the NOAA tables above, this indicates the time of sunrise with a clear horizon of 08:23 UT, ie. 26 min after the photo was taken, in the direction of Castle Douglas about 31 km away.
The gradual absorption of Germanwings into a growing Eurowings continues with pace, and whilst the airline operates a subsidiary of the larger low-cost unit with their own flight number and crews, that is soon coming to an end as a number of Germanwings Airbus A319/A320's are in the process of being repainted into Eurowings colours.
Another transition is the ending of Germanwings abandoning its 4U IATA flight codes and going over the Eurowings EW code from 25th March 2018. With Eurowings growing, Germanwings is now becoming a more redundant brand, and with the amount of planes Eurowings intends to repaint, it is likely they will be gone by 2018.
The first 2 Airbus A319's from Germanwings have already transferred over to Eurowings Europe in Vienna. Meanwhile at Eurowings, 2 Airbus A319's have since transferred with another 3 expected to join the fleet, whilst one older Airbus A320 is also expected to join the fleet.
Currently, Germanwings operates 48 Airbus A320 family aircraft, which includes 36 Airbus A319's and 12 Airbus A320's (4 currently in storage).
Alpha Golf Whiskey Alpha is no longer in service with Germanwings, delivered new to the low-cost carrier in July 2006 initially on lease from SAAM and now SMBC since July 2013. She is currently at Norwich since October 2017 being repainted into Eurowings colours. She is powered by 2 International AeroEngines IAE V2524-A5 engines.
Airbus A319-132 D-AGWA powers out of Runway 23L at Manchester (MAN) on 4U343 to Cologn/Bonn (CGN).
The Hague
August 2012
The Netherlands
I found this man lying on the sidewalk when i walked out my door yesterday. He was totally out of it, would barely respond to anything let alone say something coherent. He was so drunk he had soiled himself and he was lying across the sidewalk without any form of shelter.
I called for an ambulance but they sent the police, who proceeded to "wake" him up before taking him to the station. I hope he had a good night sleep in a holding cell, it was storming and raining yesterday so it was probably better than staying on our sidewalk..
Urban life in the Netherlands
Ricoh GRD IV
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The phenomenon of the Green Ray (or Flash) occasionally seen at sunset or — with greater difficulty — at sunrise is beautifully described by Marcel Minnaert In his book: "The nature of Light and Colour in the open air" (Dover publications inc., New York, 1954, pp. 58–63). As I have reported in a previous post ( www.flickr.com/photos/bob_81667/40402297274/ ), the visibility of the phenomenon is dependent on scattering and absorption processes occurring during the long path that sunlight takes through Earth's atmosphere to reach our eyes at these times. These processes result in what is known as the telluric spectrum of the sun which is distinct from the absorption resulting from the escape of light through the solar atmosphere.
The telluric spectrum of the sky and of the sun itself varies during the day (and night) depending on both the altitude of the sun above the horizon and on the varying content of atmospheric gases, most notably that of water vapour. In his book, Minnaert shows a rough sketch of the visual spectrum of the setting sun seen through a visual spectroscope (Fig. 55, credited to N. Dijkwel, Hemel en Dampkring, 34, 261, 1936). This shows the development of the gap between the green and the red segments of the spectrum as the sun reaches the horizon but is attributed by him to water vapour absorption which, although it does play a minor role, the much larger effect of ozone absorption on the spectrum of twilight was not widely appreciated at that time.
In this picture, I assemble some of the historical drawings along with modern digital spectra to help give a clearer picture of the contributors to the sunset spectrum.
The lower frame in the picture is the sketch from Minnaert's book of the of the sunset spectrum developing downwards with time. I assume that this is a prismatic spectrum which is squashed up towards the red end compared with the linear grating spectrum in the upper plot. I have coloured Minnaert's picture to show the correct orange colour between the middle two absorption bands. The 4th strip from the top shows two pairs of absorption bands that I have labelled, from the right to left, A, B, R and Greek(delta).
[Note added in December 2020: I am not certain in my attribution of the of the two reddest absorptions in row 4 to Fraunhofer A and B as was suggested by their position in the drawing. My own examinations of the setting sun with a visual prism spectroscope reveal that the two bands, alpha near 630nm and the combination of Fraunhofer C (H-alpha) and the water band near 650nm form a more prominent pair. If this is the case, it is worth remarking that these four features drawn in row 4 contain two bands from tetra-oxygen that could not be identified as such at the time of the original investigations by Ångström and others in the 19th century. It is now known that such CIA (see below) transitions contribute a small but significant part of the ensemble of absorptions that produce the global greenhouse effect. I think that the fact that we can see these bands with the eye through a simple spectroscope is interesting.
I have now (10/12/2020) replaced the figure with this new, and more likely, interpretation of Dijkwel's drawing.]
Above this, I have reproduced (in mirror image to reverse the spectral direction) the observations of the telluric spectrum made by Ångström and shown in the book "Spectrum Analysis" by H. Schellen, D Appleton and Company, New York, 1872, Fig. 95, p183. This is on a linear wavelength scale aligned with the spectral plots at the top of the picture. Download the full size version of the image to read the labelling on this. The drawing shows the strong solar Fraunhofer lines as well as the telluric features. Note that it also includes the blue tetra-oxygen feature at ~476nm that was shown at a shorter wavelength in one of Ångström and Thalén's (presumably earlier) maps shown in plate VI of the above book.
The top plot shows a sunset spectrum (blue line) and also a spectrum of the eclipsed moon (Pallé, E. et al. Nature volume 459, pages 814–816 (11 June 2009) — red line). These are marked with the major telluric lines and bands from H_2 O (water), O_2 (molecular oxygen), O_3 (ozone) and the O_2 * O_2 dimer (now known as the CIA O_4 Collisionally Induced Absorption). Overlayed on this is the first reported spectral plot I have found of the central part of the ozone Chappuis band absorption and reported in the Astrophysical Journal in 1934 ( articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?19... ). This is inverted and flipped left-right but you can see the characteristic double dip at the centre of the Chappuis band. The red and blue line spectra are plotted as a ratio of the the spectrum of an uneclipsed moon (top) and the spectrum of the sun seen high in the sky (bottom, blue line). This results in the removal of the intrinsic spectrum of the sun, leaving only the telluric spectrum.
So what's going on here? The principal difference between the red and blue line spectra (eclipse and sunset) in the top plot is the path that the sunlight takes through the atmosphere in these two situations. In the lunar eclipse, the light grazes the Earth on its way to producing the 'copper-coloured' moon but, in this case, the path avoids the low altitude atmosphere where most of the water vapour resides. You can see that the water band absorptions are much weaker than in the blue sunset spectrum. The other difference — a more subtle one — is that the CIA features (notice especially the one around 578nm) are stronger in the sunset spectrum which was obtained from a low altitude observing site, essentially sea-level. This is because the formation of the CIA lines needs two adjacent oxygen molecules and so its strength is dependent on the oxygen partial pressure squared and so is only really produced in the low atmosphere.
How do we interpret the spectrum sketches in Minnaert's book? The clear separation between the green and red segments in the 5th strip down is predominantly due to the ozone Chappuis absorption (see the model spectra in: www.flickr.com/photos/bob_81667/40402297274/ ). The central pair of absorptions seen in the 4 strips above is partly the result of the shape of the central part if the ozone Chappuis band but it is enhanced by the CIA absorption on the short wavelength side and by the water absorption on the long wavelength side. This water band was known by Victorian observers as "The Rain Band" since is was supposed to appear more strongly in damp weather and so was used for forecasting rain (though not very successfully!) This spectral region has a very characteristic appearance in a visual spectroscope with what appears to be a broad yellow 'emission' band flanked on either side by significant absorption. It is strong in both the sky and solar spectra when the sun is low: I have labelled these absorptions by 'delta' (as used by Ångström) and 'R' for Rainband. These are shown very clearly in the Spectral drawings by Piazzi Smyth made in 1875/6.
See: www.flickr.com/photos/bob_81667/11433988063/
The absorptions further to the red in the Minnaert sketch I suggest should be identified with the very strong molecular oxygen bands known as Fraunhofer 'A' and 'B' although it is not obvious why only a single band is shown on the 3rd strip. Maybe the observation was influenced by a strong water band marked 'a'?
Why should we be so interested in this apparently rather arcane branch of observational astronomy, even though it was all-the-rage in the late 19th century? The reason is that the use of long light paths through planetary atmospheres that can be extracted from observations of a planetary transit (when the planet crosses the disc of its ‘sun’) is one of the primary ways of learning about exoplanet atmospheres, currently a major ‘industry’ in astrophysics.
The Hague
May 2012
The Netherlands
Urban life in the Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
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« Caborne » is the vernacular word used in the Lyon city region, France, to name ancient dry-stones huts that could found in the neighboring massif of the Monts d’Or. Dry-stones huts developed in France a lot at the 18th-19th centuries and are no as old as we could first think. This flourishing age is due to the encouragement of the French Kingdom to clear some forestal domains and later to the development of small vineyard and access to the private property for little farming. Those « cabornes » were constructed following empirical rules and know-how of « caborniers », masons and quarrymen. Quarries of limestone in the Monts d’Or are still visible and gave the materials of most of the buildings erected in Lyon in the past.
Today the « cabornes » attract visitors with their ingenuity and rustic charm, often integrated into hiking trails. They evoke a sense of nostalgia and connection to nature, reinforcing regional and cultural identity. Associations of volunteers are organizing initiatives to inventory, restore and rediscovered the ancestral technics of dry-stone construction. Dry-stone huts are also found in Portugal, Spain, Italy, Ireland, Scotland and Finland as temporary shelter for shepherds and their animals, permanent habitations for monks or agricultural workers, storage and cheese making, etc.
For a third visit, I decided to go especially to the « Cabornes Girard » starting from the village of Saint-Romain-au-Mont-d’Or and using some local hiking trails. I brought along with me my brave French TLR 6x6 SEMFLEX Standard 3.5 camera (see below for details) loaded with a film Svema FOTO 100. My SEMFLEX was equipped with the original Semflex squared shade hood with, or wiyhout,a SEMFLEX yellow filter x2. The film was exposed for 100 ISO (no filter) or 64 ISO to compensate the light absorption of the yellow filter. Metering was done using a Minolta Autometer III equipped with a 10° finder for selective measures privileging the shadow areas or an opale dome for incident light integration. .
Documentary smartphone picture.
Les Cabornes Girard, August 28, 2025
69270 Saint-Romain-au-Mont-d’Or
France
After the view #12 exposed, the film was fully rolled to the taking spool and was developed in a Paterson tank with a spiral adapted to the 120-format film. 500 mL of Adox Adonal (Agfa Rodinal) developer were prepared at the dilution 1+25 and the film processed for 7 min at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) held on a Minolta vertical macro stative device and adapted to a Minolta MD Macro lens 1:3.5 f=50mm. The light source was a LED panel (approx. 4x5') CineStill Cine-lite fitted with film holder "Lobster" to maintain flat the 70mm films. The RAW files obtained were inverted witin Adobe LightRoom Classic (14.5 August 2025) and edited to the final jpeg pictures without intermediate file. They are presented either as printed files with frame or the full size JPEG together with some documentary smartphone pictures.
About the camera and lenses :
My French Semflex TLR year 1959-1960 is equipped with triplet 1/3.5 f=75mm SOM Berthiot lenses as descripted bellow.
The SEM company ("Société des Etablissements Modernes de Mécanique") was founded in France by Paul Royet in 1946, in the small city of Aurec near Saint-Etienne (Loire). The SEM camera's was known essentially for the TLR Semflex that were a great commercial success in France until the 70's. The camera's are constructed around an injected aluminum alloy chassis, very resistant and rigid permitting precise optical alignments. The focusing mechanism is made of a cam system like the Rolleiflex giving an accurate and smooth focusing. SEM constructed their own shutters called Orec with 5 leaves capable of the 1/400s to 1s with B.
Semflex received in majority French optics Berthiot with 3 or 4 lenses (Tessar type). Some camera's were also mounted with Angénieux lenses.
Semflex were trusted TLR camera's used by amateurs and for professional purposes. From 1949 to 1976, 171.000 Semflex were produced in many different types and versions.
My Semflex in a middle grade version Standard 3.5 type-10 (1959-1960). It was the last version mounted with the 3-lens SOM Berthiot 1:3.5 f=75mm. I got the camera with set of accessories and several documents including the user manual of the Semflex Standard 4.5 versions. The accessories include a leather SEM ever-ready bag, a Semflex push-on shade hood, a Semflex push-on yellow filter x2 in its original box, and close-focusing lenses. The 1D one is constructed with a prism for the finder lens that compensates the parallax in the zone 1m to 0.5m.
The decorative ring around each lenses can also receive push-on accessories in 36mm diameter as the FOCA or Leitz 36mm filter series. I adapted two protective lens caps from Kodak film canister snapped covers.
The Hague
May 2012
The Netherlands
Urban life in the Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely i will probably say yes, just ask me first!
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The Horsehead, also known as Barnard 33, is a cold, dark cloud of gas and dust, silhouetted against the bright nebula, IC 434. The bright area at the top left edge is a young star still embedded in its nursery of gas and dust. But radiation from this hot star is eroding the stellar nursery. The top of the nebula also is being sculpted by radiation from a massive star located out of Hubble's field of view.
Only by chance does the nebula roughly resemble the head of a horse. Its unusual shape was first discovered on a photographic plate in the late 1800s. Located in the constellation Orion, the Horsehead is a cousin of the famous pillars of dust and gas known as the Eagle nebula. Both tower-like nebulas are cocoons of young stars.
01-12
Improved insole; premium, 3x better moisture absorption, 100% better energy absorption
•Standard: EN ISO 20345:2011 S5 CI SRC
•Resistance: minerals, animal and plant oils and fats, disinfectants, fertilizer, solvents, various chemicals
•Lining; antibacterially treated, recognisable Dunlop red
Scheveningen/The Hague
June 2012
The Netherlands
Beachlife in the Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely I will probably say yes, just ask me first!
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Please contact me!
Please no glossy awards, scripted comments and big thumbnails back to your own work.
I will remove them...
In the late fifties Foden, a well established and respected lorry manufacturer, realised that they had to offer new improved models if they were to maintain their independence in the face of takeovers and absorption by the larger manufacturers.
Traditionally Foden cabs had been of composite build, a timber frame clad with aluminium panels but now Foden decided to move into the use of fibreglass for its new cab design.
First unveiled in 1958 the S21 cab with its elaborate curves was quickly dubbed the “Sputnik” by the trade press but lorry drivers almost always referred to them as Mickey Mouse and many S21s survived by virtue of being corrosion-free.
Like many a haulier Moreton C. Cullimore started out with a Model T Ford in the Stroud area of the Cotswolds in the 1930s but here, in the 1960s, one of his sizable fleet of Foden tippers threads its careful way though a Glouchester village while in the background a Midland Red single decker approaches its bus stop.
The original painting is in oils on a canvas board 20”x30” and was painted for a transport calendar.
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Metro
Beijing, China
July 2012
Candid shots in and around Public Transport
Ricoh GRD IV
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The Hague,
June 2012
THe Netherlands
Urban life in the Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely I will probably say yes, just ask me first!
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Den Haag
May 2012
The Netherlands
Urban life in the Netherlands
Ricoh GRD IV
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Metro
Beijing, China
July 2012
Candid shots in and around Public Transport
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely I will probably say yes, just ask me first!
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Please contact me!
Please no glossy awards, scripted comments and big thumbnails back to your own work.
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Planets, stars, nebulas and a galaxy -- this impressive image has them all. Closest to home are the two planets Mars (right) and Saturn (center), visible as the two bright orange spots in the upper half of the featured image. On the central right are the colorful Rho Ophiuchus star clouds featuring the bright orange star Antares lined up below Mars. These interstellar clouds contain both red emission nebulas and blue reflection nebulas. At the top right of the image is the Blue Horsehead reflection nebula. On the lower left are many dark absorption nebulas that extend from the central band of our Milky Way Galaxy. The featured deep composite was composed of multiple deep exposures taken last month from Brazil. Although you need a telescope to see the nebulosities, Saturn and Mars will remain visible to the unaided eye this month toward the east, just after sunset. via NASA ift.tt/1Xj749i
Leiden
The Netherlands
2013
"Look what i found! Its the covert photographer's blog!"
Since today there is a blog: thecovertphotographer.wordpress.com/
On the blog i will attempt to provide more background to my images and discuss photography and everything else worth discussing on a blog.
Follow and spread the word if you like what you see.
A slide from the webinar introduced in the adjacent post. Thanks to Yuri Baletsky for the use of two of his wonderful sky images from the Chilean Observatories.
The colour bands arise from the balance between the opacity of the atmosphere at different wavelengths and the total column density of atmosphere taken when sunlight traverses different paths to reach us from different directions in the sky.
Train
The Netherlands
2012
Candid shots in and around the Public Transport in The Netherlands
Ricoh GRD IV
Den Haag
May 2012
The Netherlands
Candid shots in and around the Public Transport in The Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
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Amsterdam
June 2012
The Netherlands
Urban life in the Netherlands
Ricoh GRD IV
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Scheveningen/The Hague
May 2012
The Netherlands
Beachlife in the Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
If you ask nicely I will probably say yes, just ask me first!
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Please contact me!
Please no glossy awards, scripted comments and big thumbnails back to your own work.
I will remove them...
May 2012
The Netherlands
Candid shots in and around the Public Transport in The Netherlands
Ricoh GRD IV
Please do not reproduce or use this picture without my explicit permission.
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Appreciate the awards and scripted comments
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