Hi All It has been recently discussed about film reciprocity failure in my photography class at college. I have personally never considered this into my calculations of exposure times and simply accepted the speeds suggested by my Pentax (PZ-1 & PZ-1p) light meters and had good luck. The safe zone is only from about 1 second to 1/1000 second. As you all know our cameras exceed that greatly on both sides of the spectrum. 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.
Dave
