Please help me think this through:
I have splurged on a box of 4x5 glass plates from Lane. They say these plates are sensitized to about ISO 2. I am trying to get a handle on what I can do for an initial set of test exposures.
If I assume "Sunny sixteen" conditions, I would expose an ISO 100 film at 1/100 sec and f/16.
By counting on my fingers, ISO 2 is something like six stops slower than ISO 100. Figuring back from f/16 to my widest available aperture of f/5.6 and slowing down to 1/10 sec I ran out of fingers.
Do I have that right?
Are these equivilant exposures under bright conditions?
f/16 at 1/100 sec
f/5.6 at 1/10 sec
Bookmarks