How to shoot decert in night with many starts on the sky?

[carbonmetrictree]

Evgeny, I had a gallery of images a few months ago with a technique I found to push Ilford 3200 film to an ASA 100,000. This might be useful for you if you do not want star movements, the images at ASA 100,000 developed with a combination of Xtol and Dektol separate developents resulted in a grain structure similar to 3200 pushed 1 stop. If I can find my developing times and dilution ratios, I'll send you a PM.

 

[evgeny]

Evgeny, I had a gallery of images a few months ago with a technique I found to push Ilford 3200 film to an ASA 100,000. This might be useful for you if you do not want star movements, the images at ASA 100,000 developed with a combination of Xtol and Dektol separate developents resulted in a grain structure similar to 3200 pushed 1 stop. If I can find my developing times and dilution ratios, I'll send you a PM.

Wow!
ASA 100,000, what ISO is it?
Thank :thumbup:

 

[carbonmetrictree]

It's ISO 100,000! I got it up to a million ISO, but the results are very sporatic. I have only one roll of film that was processed correctly. Even with 1/2 a degree off, the results at this amount of a push are pretty drastic. I'll PM you the info when I find it, I have to clean up my negatives and notes to locate it.

At a 1,000,000 ISO, specular highlights are really weird at night It almost looks like all of the lights have a halo effect, not like flare, but more like a "crown" around the light. If you've ever used an A and B solution for Lith, the grain structure is kind of like a lith development with Agfa 111 Classic.