View allAll Photos Tagged selenium
A selenium meter for mounting in the accessory shoe. Dimensions: 31mm diameter at the end of the hood, 39mm long (1 1/2 x 1 9/32 inches).
Shoe mount (foot?) is hidden on the other side.
Slightly unusual in having a concentric circle pattern on the cell window, rather than the conventional honeycomb .
My grandparents' old GM Model B Standard Exposure Meter. It's got a slide rule on the back for you to determine your f-stop/shutter speed. I learned from a friend today that this is, in fact, powered by Selenium! And it still works!
Note: Another neat fact: This is from around the 40s! And you can get one for, like, $20!
Inspired by the fascinating test strips of Pierre Cordier in the shadow catchers show and using the denser of my Gum negs I contact printed on silverprint proof paper under the sunbed for about 25mins
Fixed, and toned in selenium 1:15
fomaspeed variant III mg 312, rollei lith, selenium 1+1+9, neopan ss @200, heliar classic 50/2, yellow-green #11, bessa r2a, hc-110.
scanned negative: www.flickr.com/photos/501rf/2517383190/in/set-72157605200...
The Robin Illuminometer 5200 is a copy of Sekonic's 246 Handy Lumi. Scale in Lux. Made in Japan by Sekonic. Around 1965.
My new baby girl whe she was still in the hospital.
I can't find many (if any) reference images for before/after toning of various papers and I can't find a copy of Tim Rudman's book on toning, therefore I am creating tests and will try to publish them here for the rest of the darkroom users out there!
Top: Kodak Polycontrast RC glossy paper
Middle: Forte Polywarmtone FB paper (added white vignette)
Bottom: Forte Polywarmtone FB paper, toned in Harmon Selenium toner
All prints developed in rather used Ilford warmtone developer and 2 bath fixed to eliminate toning stains.
Tmax 400 film, shot at iso 800, developed in Tmax dev.
I decided to use selenium to create a blue tone on this one to bring out the tonality of this ignition image. Thoughts welcome.
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Here's a photo from 18 June 2014, when Collings Foundation brought their B-17, B-24 and P-51 to Skagit Regional Airport. My photoset is here.
Metrovick selenium light meter, made in Manchester by Metropolitan Vickers - a company better known for heavier engineering, such as railway rolling stock, guns and aircraft. They made these (apparently) from 1938 until at least 1947. The dial reads shutter speeds for an aperture of f8 and 23° Scheiner film (it says so in the corners of the dial). It's small - the face is about 49x45mm (less than 2 inches). The calculator for other film speeds and apertures is heavy brass, and slots into the cover of the leather case (or, in mine, falls out of the case as the stitching is worn).
3/4-rear view of “selenium*” rectifier lamphouse power supply for the RCA Arc 400 carbon-arc 16mm movie projector, showing the AC input, pilot light, and DC output.
*That's what the specification plate says; a peek through the grille with a flashlight reveals this unit was retrofitted with a pair of high-current silicon diodes mounted in heat sinks along with a large electrolytic capacitor to smooth the DC output.
Compact 24x36 courant en France. Exemplaire n° 833268, objectif fixe, 45 mm, ISCO Color-Isconar, f:2.8(22), mise au point sur l'optique, 1m-infini, obturateur central Gauthier (AGC) Prontor 300 à lamelles métalliques, vitesses 30-300 + B, cellule sélénium non couplée en façade et disque de choix du couple vitesse d'obturation / diaphragme pour la sensibilité de film affichée (ASA / DIN), viseur interne fixe, collimaté. 128 x 90 x 70 mm, 430 g, Une évolution du Dignette 300, modèle sans cellule.
Vide-grenier du 7 octobre 2012, Brindas (Rhône)
Sekonic Auto-Lumi L162 selenium cell light meter, used by the photographer to set exposure on 6 of his cameras (which either don't have LM's or don't have working LM's) and to check the light meters on the cameras that have them! This model was the first light meter used by me, but a different sample than his first one. (...which was lost, stolen, or died; I don't remember which!) Yellow tape measure is in inches. Taken in Albany, CA by a Nikon D40x with a Nikon 18-55mm non-VR kit lens. (at 55) Camera's on-board flash fired.
The meter has three modes: bright light (as seen), reduced light (what the dial is set for... the little lid on the front opens up) and dim light. (which has the reduced light lid up, and a booster pops down from the bottom of the meter... which doesn't work on this sample, as the booster doesn't release.)
Meter is set for the film speed most used by me, particularly in medium-format cameras with lenses in the ƒ 3.5 range! (ASA is the same as ISO, for newer photographers out there...)
The red dial is for use with a movie camera, and is the reverse of the black still camera dial - in the still camera's area, the shutter speeds move with the match needle; on the movie camera the f-stop moves...
I'm not sure why this light meter goes all the way to ƒ 1, as only one lens (the Canon 50mm ƒ 0.95, only available for the Canon 7 rangefinder...) had even come close to that figure, at the time this meter was in production! (1969-72...)
A cute little Russian oddity, complete with Cyrilic text. I believe this was released in around 1983, though my case is marked 1992. This would have been outdated technology when it was released in 1983. That's the Soviet Union for you...
Adox Variotone in SE6 Blue
steps from left to right
1. MT3 Vario - bleach 1+200 30 secs, toner 25+7+500ml
2. MT1 Selenium 1+10 3 mins
3. MT7 Iron Blue 2,5+2,5+7+3+900ml 3 mins, clearing bath 2 mins, ammonia 0,01% sol 20secs
view large
This picture is a reminder that not everybody has somewhere warm to go home to each night, and not everybody who's cold and alone is merely an inconvenience to the rest of us.
Blind Willie Johnson was a singer and guitar player early in the 20th century. He died penniless and alone of pneumonia in the burned out ruins of his house covered in wet newspaper, but his music was chosen to go on the Golden Disc attached to the Voyager spacecraft.
His music is has traveled further than any other man-made object, and lives on.
Yashica FX-3 Super 2000. Ilford multigrade IV RC Deluxe. Warmtone developer, slightly selenium toned.
Posemètre (cellule sélénium) pour la photo ou le cinéma fabriqué par Dorn, Neustadt / Weinstrasse Plus d'infos. Vendu par FNAC (Lyon) le 12 juillet 1974.
L'étui est en pur simili.
Decaying smoke stack at the Herring factory in Djupovik, Iceland. Printed on Ilford warmtone with selenium
Scanned Silver Gelatin Print
Ilford Multigrade Paper
Triple Band toned in Sepia/ Selenium
Shot with Ansco Rediflex on 620 film
Not sure why they left this one.....
Hasselblad, 50mm lens, Acros in Pyrocat, printed on Ilford MG fiber with light sepia then complete selenium toning
Bridleway
075 / 365 [Project 365]
Decided to go a little further off the beaten track today, and Tobi and I took a wander along the one of the ancient bridleways of North Cornwall. It was very squelchy underfoot, but was a good chance to see how well the 5D3 held up to it's weather resistant claims... needless to say it survived without issue, and managed to capture some great images despite the constant downpour. We both returned home looking like survivors of the Somme, but had shared a thoroughly enjoyable adventure...
28 X 35.5 cm , gelatine silver print on baryta paper, with selenium toning, 2006
now be sold edition number 1 / 10
Posemètre (cellule sélénium) pour la photo ou le cinéma fabriqué par Dorn, Neustadt / Weinstrasse Plus d'infos.
Un exemplaire plus récent est présenté ici.
Brocante du 3 mars 2013, Montrottier (Rhône)
fomatone 132, selenium 1+1+9,
arista premium liquid lith 1+1+24+old brown, bessa r2a, b+w #89,
hc-110, ilford sfx 200 ei200, heliar classic 50/2.
on a girl kick.
©bethephoto.com / bridget photography - 2007
Photo cannot be used for any reason without the written permission of the photographer.
(edited to take out the black border - works better plain.)
slavich bromportrait 80 grade 3, selenium 1+1+9,
arista premium liquid lith 1+1+24+old brown, bessa r2a, yellow-green #11
hc-110, neopan ss ei200, heliar classic 50/2.
Another day, another lith print...
Next print in the series. The original print colour was much the same as for 'theme', so I split-toned this in selenium and finished it in gold toner.
Lith print on Foma Nature II 532. Developed in warm Fotospeed LD20, plus old brown. Split-toned in selenium, finished in gold.
Mamiya RB67, Kodak Tri-X 400, Rodinal (1+50).
A plastic bag contained this sparepart selenium cell for the famous Olympus Pen EE camera. So must be from around 1962.
Pity my Japanese is so bad.
KMZ Iskra 2.
Russian rangefinder folder 1961~1964
In the middle you can see the Selenium Cell.
Again, clearly somebody repaired/tampered before and obviously loved to use generous amounts of glue.
oriental new seagull vc-fb II glossy cooltone,
rollei vintage, selenium 1+1+9, neopan ss, m-hexanon 50/2, hc-110, hexar rf.
Haven't done any Selenium treatment in a while, thought I'd give it another go.
Suncor Energy Centre on 5th Avenue SW.
Seen at 11.5mm and f/8
Larger Here - farm5.static.flickr.com/4128/5206158462_d8d42dd640_b.jpg
Rayleigh's Owl (like Rayleigh's Fish ) is made from glass containing a metal vapour that results in a 'perfect' Rayleigh scatterer. When illuminated in different ways, it can mimic the entire range of twilight colours seen in the sky. The two spectra shown here represent the transmission of light through the whole height of the owl (red line) and the scattered blue light looking sideways close to where the light beam enters the glass (blue line). These represent the setting sun and the blue sky respectively. The spectra also show absorption features due to selenium used to remove the green (iron) tint from high quality glasses.
Note that the rise in the scattering curve shoreward of ~400nm is due to uncorrected straylight in the spectrometer. At the time I made this observation, I did not know how to correct for it. Now I do (April 2015). See the comment from me below.
underpass under the A1(M) just north of Leeds, nr Wetherby
i was having a clear out and thought i'd try this in b&w. used my new toy (Silver Efex Pro) to add some structure and a selenium tone (with a bit of gold in the highlights). would be interesting to see if i could get the same detail straight out of the camera.
Selenium in sandstone from New Mexico, USA. (SDSMT 3909, South Dakota School of Mines and Technology Museum of Geology, Rapid City, South Dakota, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
Elements are fundamental substances of matter - matter that is composed of the same types of atoms. At present, 118 elements are known (four of them are still unnamed). Of these, 98 occur naturally on Earth (hydrogen to californium). Most of these occur in rocks & minerals, although some occur in very small, trace amounts. Only some elements occur in their native elemental state as minerals.
To find a native element in nature, it must be relatively non-reactive and there must be some concentration process. Metallic, semimetallic (metalloid), and nonmetallic elements are known in their native state.
The rock shown above is from a "roll front deposit", in which native selenium occurs along a redox front in fluvial sandstone (see Granger & Santos, 1982).
Stratigraphy & age of host rock: fluvial sandstone, Westwater Canyon Member, Morrison Formation, Upper Jurassic
Locality; Section 23 Mine, Ambrosia Lake Mining District, north of Grants, New Mexico, USA
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Reference cited:
Granger & Santos (1982) - Geology and ore deposits of the Section 23 Mine, Ambrosia Lake District, New Mexico. United States Geological Survey Open-File Report 82-207. 70 pp.