caculating zone system film development times -1,+1...greenspun.com : LUSENET : B&W Photo - Film & Processing : One Thread |
It has been a long time and I don't recall how to determine development times when using the zone system (+1, -1...). I usually shot t-max 100. Can anyone help with guidelines?
-- Craig A. Uecker (zonie@gwi.net), February 25, 1999
There's no fixed rule, you have to do tests. You might start with plus or minus 20%.
-- Alan Gibson (Alan.Gibson@technologist.com), March 03, 1999.