View Full Version : Film areas?

Calamity Jane
19-Sep-2005, 18:55
Somewhere I saw a chart that gave equivalent areas for different film formats but I can't seem to find it again.

Some chemical data sheets give life in 36/35mm, 120 films but don't mention large formats.

Anybody got a link to that chart?

Thanks crew!

David A. Goldfarb
19-Sep-2005, 19:16
You mean for the purpose of determining developer life?

Just think about it--a roll of 35mm or 120 contact prints to about 8x10" or 80 square inches, same as a sheet of 8x10", 4 sheets of 4x5", close enough to two sheets of 5x7" for government work, half a roll of 220, half a sheet of 11x14", a quarter of 16x20", etc.

Calamity Jane
20-Sep-2005, 03:53
Thanks David! I don't even have a roll of 35mm in the house anymore and I haven't shot one in over 25 years so I don't remember how long a 36 exp. is ;-)

Yes, it's ID-11 that gives life as 10 rolls of 36 exp. 35mm and I was trying to figure out how many 4x5's and 8x10's that would be.

I did see a little chart somewhere online. Next time I run across it, I'll print it off for my darkroom notebook.

Thanks again.