Tools
For the darkroom.
Calculators that answer from what makers actually publish — each number with its source, and an honest “not published” where there is none.
Development calculator
Film, developer, dilution, speed and temperature — and the published time with the datasheet it came from. Corrections for a warmer bath or a reused developer, and a tank card to print.
513 films · 8 400 published times Open ›
Long exposures
Type the metered time: get the time to expose and the stops it adds, from the maker’s own reciprocity data. Nothing below a second, nothing beyond the maker’s table.
8 films with reciprocity data Open ›