Hi Guillermo, Thank you for your reply. Obviously, I miscalculated the math for my exposures (*sigh*). However, just to clarify..on the calculations given below, wouldn't it be f16 @ 1/100 secs and not 1/25 sec? I apologize if I am incorrect, but I'm trying to understand the basis for the formula and the 804 film is ASA 100. Given this, wouldn't the initial exposure (not factoring in reciprocity) then be around 10 sec. rather than 40 sec?
To answer your question I had taken a metered reading of the northern sky rather than the snow for these exposures. The reflection was just too bright from the snow for me to think I would get an accurate reading. The reading came to EV16. Now, here is the part that, looking back, I can't explain...somehow I came to an exposure of 15 minutes. Please don't ask me how I did this, as now that I am thinking about it, I have no idea. Nontheless, an obvious miscalculation on my part. Unfortunately the snow has melted but I will be out again this weekend to try once more. Thanks again! Bill- "G.Penate" wrote: > Bill, > Using sunny/16, your exposure should be f/16 > @ 1/25 secs. There are about 10 stops separating f/16 from f/500, therefore > for your camera, the uncorrected exposure time should be around 40 secs (2^10 > * 1/25). > > Could you tell us what's your metered or estimated uncorrected exposure time > and actual exposure times you have used? > > Guillermo > > > > _______________________________________________ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.p at ???????/discussion/
