Howdy, I have two films I'm hoping someone has some experience with for long(ish) exposures. The MZ3 is an old film duplicating (forget the proper term) stock that is currently made by Astrum, and the A125 is a near total mystery, currently made by some guy in Russia, with some comparing it to military aero-reconnaissance film. I managed to get the datasheet for the MZ3 from the very helpful customer support, but it doesn't have reciprocity data and they couldn't help me. The A125 is a near total mystery, as the store that sells it could only give me some development info, and I don't know enough Russian to search Russian forums myself.
In case you were wondering, yes, the number in each name is the ISO. I don't see myself doing longer than maybe a second with the A125, and I plan to bracket sensibly when I shoot slower than, I dunno, half a second. With the MZ3, however, doing long exposures was the whole point of getting such a slow stock, and I'd hate to go in blind, bracketing five or more stops, especially when each exposure takes several minutes! I am prepared to, of course, I'm just hoping someone here has played with it a fair bit and can point me in the right direction. I've done a little bit of long exposure stuff with Tri-X, doing nighttime exposures on the order of 15 seconds to a minute, though I just finished that roll and don't have the results yet.
In case you were wondering, yes, the number in each name is the ISO. I don't see myself doing longer than maybe a second with the A125, and I plan to bracket sensibly when I shoot slower than, I dunno, half a second. With the MZ3, however, doing long exposures was the whole point of getting such a slow stock, and I'd hate to go in blind, bracketing five or more stops, especially when each exposure takes several minutes! I am prepared to, of course, I'm just hoping someone here has played with it a fair bit and can point me in the right direction. I've done a little bit of long exposure stuff with Tri-X, doing nighttime exposures on the order of 15 seconds to a minute, though I just finished that roll and don't have the results yet.