B&W AND Color Pairs
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As I mentioned a few days ago, I am currently looking into the production of ferric oxalate, not because I am dissatisfied with Bostick&Sullivan's product, but merely out of a thirst for knowledge.
I do not know the recipe of B&S, presumably it is iron(III)-nitrate and oxalic acid.
In my first attempt I followed the recipe of Pizzighelli and Hübl (ferric hydrate and oxalic acid). An interesting alternative, but time-consuming.
In the second attempt, it was iron(III)-nitrate and oxalic acid. The time required is similar, but with fewer steps.
The substance is not clearly defined, which makes it difficult to determine the exact content of oxalate solutions. The prevailing opinion is that the solution for the platinum process should contain 27% iron(III)-oxalate, for the Kallitypy 20%.
For practical purposes, the determination method using the specific gravity is sufficiently accurate, although any free oxalic acid present cannot be determined.
For the Kallitype, a specific gravity of 1.13 results in a solution of about 20%; for the comparison of the mode of action, the three oxalate solutions were brought to exactly this value. The measurement of the pH value showed clear deviations between the (acidic) solutions, which indicates different contents of free oxalic acid.
Paper: Hahnemühle Platinum Rag
Developer: Sodium Acetate
To obtain comparable densities, different exposure times were necessary.
From left to right:
B&S 3 minutes, P&H 2:30 minutes, Ox (iron nitrate) 2:15 minutes.
Wie schon vor einigen Tagen erwähnt, beschäftige ich mich momentan mit der Herstellung von Eisen(III)-Oxalat, nicht weil ich mit dem Produkt von Bostick&Sullivan unzufrieden wäre, sondern lediglich aus Wissensdrang.
Die Rezeptur von B&S ist mir nicht bekannt, vermutlich handelt es sich um Eisen(III)-Nitrat und Oxalsäure.
Bei meinem ersten Versuch bin ich nach der Rezeptur von Pizzighelli und Hübl (Eisen(III)-Hydrat und Oxalsäure) vorgegangen. Eine interessante Alternative, doch der Zeitaufwand ist hoch.
Beim zweiten Versuch waren es Eisen(III)-Nitrat und Oxalsäure. Der zeitliche Aufwand ist ähnlich hoch, allerdings bei weniger Arbeitsschritten.
Die Substanz ist nicht klar definiert, was es schwierig macht, den exakten Gehalt von Oxalat-Lösungen zu bestimmen. Nach vorherrschender Auffassung sollte die Lösung für den Platinprozeß 27% Eisen(III)-Oxalat enthalten, für die Kallitypie 20%.
Für die Praxis ist die Bestimmungsmethode über das spezifische Gewicht hinreichend genau, wobei allerdings ein eventuell vorhandener Anteil an freier Oxalsäure nicht festgestellt werden kann.
Für die Kallitype ergibt sich bei einem spezifischen Gewicht von 1.13 eine etwa 20% Lösung, für den Vergleich der Wirkungsweise wurden die drei Oxalatlösungen auf exakt diesen Wert gebracht. Die Messung des pH-Wertes zeigte deutliche Abweichungen zwischen den (sauren) Lösungen, was auf unterschiedlichen Gehalt an freier Oxalsäure hindeutet.
Papier: Hahnemühle Platinum Rag
Entwickler: Natriumacetat
Um vergleichbare Dichten zu erhalten, waren unterschiedliche Belichtungszeiten erforderlich.
Von links nach rechts:
B&S 3 Minuten, P&H 2:30 Minuten, Ox (iron nitrate) 2:15 Minuten
"This physical world has no two things alike. Every comparison is awkwardly rough. You can put a lion next to a man, but the placing is hazardous to both."
– Rumi
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Here is comparison showing a capture made back in 2018 at 2 seconds & ISO 5000 and one taken last evening at 40 seconds with the star tracker mount. View large to see the differences.
Note, both captures taken here in Baltimore, Maryland
comparing mobile phone auto night shot (6 sec. long expos. ) and Dslr manual (4 sec. L. expos. ),(both hand held no tripod) problem with DSLR, things look much brighter on its compact screen till you enlarge ( deceiving)
strangely wiith the phone camera, a speed boat passed while taking the shot but still captured no movement ,
both no edit
... one needs knowledge, a set of skills, good training and a sense of responsibility when getting gas pipes into the ground and making sure that energy arrives at people's homes. This is what we would expect, of course. However, and by comparison, you don't need any of these qualities if you want to become the British Prime Minister. Actually, the moral and intellectual requirements are so refreshingly low these days that any pig having its snout firmly in the trough could apply. And they did. Fuji X-E2 plus Helios 44M-7 at F11.
Here we have the transom of Kaiwo Maku, one of the largest tall ships in the world (361' in length) and passing her on her starboard side is a 18-20' pleasure craft.
Verdict....... absolutely no comparison :-)
Compare this with the bald eagle and mocking bird shot. The bald eagle is perched near the front top of the tower. Another is perched about half way down. No one walking the path I was on saw them unless I pointed them out! I love my long lens! I also love my iPhone for getting shots like this one.
Leica M Mono, Leitz Elmar 4/135 at F8. Of course, this comparison to the previous image is not straightforward. It is not just a different and much more expensive camera, the lens has a different focal range and is really old (over 60 years). But I do not think that the previous image, done with a "budget combo", is in any way inferior to this one. In fact, when it comes to judging an image as "interesting" or "artistic" I don't think that the question of budget or not plays a role at all.
Herring Gull (l) and Lesser Black-backed Gull (r). HG - grey back, pink legs, yellowish eyering round pale eye, yellowish gape; LBBG slate-grey back, yellow legs, orange-red eyering round pale eye and orange-red gape.
Brandgans und Sandregenpfeifer im Größenvergleich.
Size comparison of common shelduck and little ringed plover.
2T5A9409
an American Widgeon and an Eurasian Widgeon
Larry and I had to come down to shut up the shore house for the season this weekend.
We got here just in time for a lovely sunset Thursday night. I was expecting it to be the last time I saw the sun while we were here since the forecast didn't sound too promising. Friday was overcast and foggy, and I expected Saturday to be a repeat, so I was pleasantly surprised when yesterday turned out to be simply lovely!
Larry and I grabbed our cameras and headed down to Cape May to walk the nature trails.
It was a stellar day!
Posting some of the birds we came across.
Hopefully, I'll be able to catch up with everyone tonight when I get home!
Have a great day Peeps!
"What lies behind you and what lies in front of you, pales in comparison to what lies inside of you."
Ralph Waldo Emerson
Plant ornament is the most widespread ornament after geometric, it is characterized by its favorite motifs, and the latter are different in different countries, at different times. Plant ornament, in comparison with other types, provides the greatest opportunities for creating a variety of motifs, execution techniques, for an original interpretation of form. Plant ornament uses numerous forms of plants: leaves, flowers, fruits, taken together or separately. This is an artistic reworking of various forms of the plant world. In the hands of an ornamental artist, the original forms, scales, colors change and are subordinated according to the laws of symmetry. In stylization, all typical features of the plant are enhanced in accordance with its character, and the particular or accidental are removed or weakened. Often these changes are so significant that the original material is transformed beyond recognition. The most common plant forms since ancient times include: acanthus, lotus, papyrus, palms, hops, laurel, grapevine, ivy, oak.
Орнамент купольного пілону. Храм на честь ікони Божої Матері «Печерська». Скит Києво-Печерської Лаври.
Рослинний орнамент - це найпоширеніший орнамент після геометричного, для нього характерні свої улюблені мотиви, причому останні різні в різних країнах, у різні часи. Рослинний орнамент у порівнянні з іншими його видами надає найбільші можливості для створення різноманітних мотивів, прийомів виконання, для оригінального трактування форми.
Рослинний орнамент використовує численні форми рослин: листя, квіти, плоди, взяті разом чи окремо. Це художня переробка різноманітних форм рослинного світу. У руках художника-орнаменталіста початкові форми, масштаби, колір змінюються і підпорядковуються за законами симетрії.
При стилізації посилюються відповідно до характеру рослини всі типові особливості її та видаляється або послаблюється окреме або випадкове. Часто ці зміни настільки значні, що початковий матеріал перетворюється до невпізнанності.
До найпоширеніших рослинних форм з найдавніших часів відносяться: акант, лотос, папірус, пальми, хміль, лавр, виноградна лоза, плющ, дуб.
A Neotropic cormorant on the left (Phalacrocorax brasilianus) and a Double-crested cormorant (Phalacrocorax auritus) on the right. The size difference is clearly apparent. Always interesting to get two different versions of the same species in the same image. There are arguably 40 different species of the cormorant / shag species.
Member of the Flickr Bird Brigade
Activists for birds and wildlife
The male Downy on the left and male Hairy woodpecker on the right landed on the same perch within a minute of one another. I was at the same focusing distance in similar light for both shots. I ten combined the two shots in photoshop for a comparison image....
Yup. Pretty cool. PLEASE COMMENT IF YOU FAVE!
www.artstation.com/artwork/superman-redesign-2f1cbf16-290... #photogrid
Leica M Mono, Leitz Elmar 4/135 at F5.6. The settings for both shots are broadly the same (ISO 2500 corresponds to ISO 1250 on the M8) and I tried to edit both images in the same way as well. I am not trying to demonstrate that rangefinder cameras can do animal photography - we all know that other camera types do better in this regard. The comparison is rather between the old and low resolution M8 and the more advanced M Monochrome. It turns out that in terms of sharpness, the old M8 is still going strong. Resolution is more of a problem, especially at higher ISO settings (so, the M8 would struggle with nature and landscape photography). For portrait and street, in fact for all subjects where roughness is legitimate, the old camera is a wonderful tool. The Monochrome can do all of it and is more open to post-processing intervention.
|comparison|
The bananas on the right look to be the perfect ripeness for eating (in my opinion—different people like different levels of ripeness when it comes to bananas). The bananas on the left appear too ripe for eating plain (again, my opinion) but they are excellent for baking or making smoothies. Both bunches of bananas are different in which ways they’re best enjoyed. When I compare my lack of capacity to achieve a lot of great things with someone in different circumstances who has the capability to do things I’m not able to it’s easy for me to fall into deep shame and guilt. I need to continually remind myself God created each of us unique and we have different experiences that shape us therefore it’s not always helpful to compare myself to others. It gives me the freedom to be who God created me to be with unique gifts and abilities and focus on growing in the ways He desires for me—which I’m still working on and probably will be for as long as I’m alive.
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My first attempt at developing film at home. For me it was an overwhelming process and I’m thankful I gave it a try. There is so much satisfaction and enjoyment for me to be able to accomplish this despite my fears and most of my days being about survival without having the capacity for much “extra” stuff. Being able to see the final image is so amazing after this whole process. It turned out much better than I expected. I’m still learning.
Nikon F100
Nikon 35mm f/2 D
Fuji Superia X-Tra 400
Self developed at home - Unicolor
Negative photographed with DSLR and converted to positive using Lightroom
Snow and Ross Geese side by side for comparison. I've been trying to get a shot like this for years.
This is a test of the Luminar 4 photo editing program that I recently acquired and am now trying out.
The bottom panorama photo was taken on April 22nd, Earth Day and the top image is the augmented black and white version that I did using the Luminar AI Sky replacement and the black and white tools in the program.
The comparison between the two images is quite striking.
So far I'm very impressed with the capabilities of the Luminar 4 editor and the results that can be achieved using very little effort.
Here you can see the colouring and bill differences between an immature male and an older male Surf Scoter.
I’m posting 2 images for comparison. Which do you like best? The first image is what the camera saw and is the more realistic image. The green color in the sky is caused by airglow. The second image is my interpretation of what we would expect to perceive if we had better color vision at night (our dark vision is primarily black and white). The second image is how I usually process images, trying to make the image closer to something people can identify with. This summer I had numerous nights with marked airglow and green skies. There was a lot of wildfire smoke on the horizon which I have tried to minimize. __________________________________________. Technique: Both images made from the same captured images at 20 mm. Both images are blends made from stacked images, one set for the sky and one set for the foreground. Sky, stacked vertical panorama, 3 sets of images, 12 in set, at 13 sec, f/2.8, ISO 6400. Foreground, 9 image stack, 30 sec, f/1.8, ISO 6400.
Home Tan & Home Afro & face-up to:Grazi
Puki Puki Cupid - Rubi - Cupid 2 - Sugar - Lily
photo by Grazi
Kentmere films. Recently I started using Kentmere 200, so I wanted to have a look against Kentmere 400, the film I have been using alongside HP5+ for a long time. I concluded that in most cases, in normal lighting like this, there is not an enormous difference between the two. I will, over time, discover how it'll go in more challenging lighting scenarios.
200 on the left, 400 on the right.
Someone asked me to do a height comparison, so here it is! :D I can't believe how big Aline is compared to Pansy xP Hehehe. Now holding my minifees they seem so tiny! It's weird!
Lili Sharif © All rights reserved
Dear all, I will find a moment during the day to visit your photo stream, enjoy the day!
MNNR 75 shoves between cuts of hopper cars and backs around one of the large silos still left near the UMN campus. This Commercial job is switching the AG Commodities loading facility near the stadium (background far left).
It appears someone managed to place some artwork on the top window of the elevator.