Polaroid Type 55 reciprocity corrections?greenspun.com : LUSENET : Large format photography : One Thread
I've searched Polaroid's web site and the archive, and can't find an answer for this one:
Where can I find a listing of recommended reciprocity corrections as a function of time for Polaroid Type 55 P/N (they don't have to be official; Somebody else's empirical results will serve as a starting point). I'm more interested in the behavior of the negative than of the positive, if they're different.
Also, does anybody out there have a feel for how the Type 55 neg. behaves under multipop flash illumination? There seems to be 0.5-1 stop of loss going from 1 flash pulse to 4. Is this consistent with what others have experienced?
-- Patrick Chase (email@example.com), July 28, 1999
Patrick, not to cut the answer short, but read Polaroid Photography by Ansel Adams, you should be able to get it at your local library. Pat
-- pat j. krentz (firstname.lastname@example.org), July 29, 1999.
OR, contact Ron Wisner at email@example.com Pat
-- pat j. krentz (firstname.lastname@example.org), July 30, 1999.
Generally when I do a multi-pop exposure I start to add an extra pop for every 5 the meter reads. I do this with all film. I am not that surprised that you are losing about a half stop on the Type 55.
-- Ellis Vener (email@example.com), July 31, 1999.
Polaroid has print tech sheets (hole punched, even) for all film types. I believe they're still available thur their 800 CS No. Ask them why it's not on the WEB site. too if you think of it
-- C MATTER (firstname.lastname@example.org), August 02, 1999.