what film have you been using? if slide film, then whatever you have been using hasn't had enough reciprocity failure to notice. Provia 100F is a good example of one that isn't affected by exposures as long as 30 seconds. if a print film, then you need to look at the density of the negatives. if all you have been looking at is the prints, the difference usually isn't enough to notice as you will compensate for a slightly thin negative with a slightly higher paper grade. no Pentax cameras make any such compensation.
Herb.... ----- Original Message ----- From: "David Miers" <[EMAIL PROTECTED]> To: "[EMAIL PROTECTED] Net" <[EMAIL PROTECTED]> Sent: Tuesday, March 02, 2004 9:45 AM Subject: Film Reciprocity failure and high/low shutter speeds > My question in a > nutshell is are the onboard computers in the Pentax cameras smart enough to > be calculating for this failure ahead of time and is there any information > in the DX coding that helps the computer make such a calculation? I've done > exposures up to the 30 seconds suggested and supported by included shutter > speeds and nailed the exposure. Some of the charts indicate I should be > using up to 2 minutes here depending on the film.
