[LargeFormat] Polaroid film

[Jim Brick]

At 02:50 PM 5/21/2003 -0600, Stan McQueen wrote:

>Polaroid has both sheet film and pack film. You want the sheet film. I 
>particularly like the Type 55 PN film, because it give you both a positive 
>and a negative which, after clearing in sodium sulfite solution, can be 
>printed or scanned.
>
>Stan


If you want both a Polaroid print and a real negative, you have to use two 
sheets of film because the exposure is different for each. You have to use 
the given ASA for a good print and cut the ASA in half to get a good 
negative. Here's what Polaroid says:

"When you expose 55P/N you can get either a good negative or a good print 
from one sheet of film. You cannot do both. This is because the speed of 
the negative and the print is different. Usually, a good negative has an 
effective ISO of 25-40; the print-an effective ISO of 80-160."

Jim