Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!gem.mps.ohio-state.edu!pacific.mps.ohio-state.edu!tut.cis.ohio-state.edu!att!cbnewsj!jwi From: jwi@cbnewsj.ATT.COM (Jim Winer @ AT&T, Middletown, NJ) Newsgroups: comp.graphics Subject: Re: photographing screens Summary: Lost in Space Keywords: film reciprocity error Message-ID: <2500@cbnewsj.ATT.COM> Date: 29 Nov 89 14:12:34 GMT References: <3777@hydra.gatech.EDU> <18678@watdragon.waterloo.edu> <264@fe2o3.UUCP> Distribution: na Organization: AT&T Bell Laboratories Lines: 18 Rusty Haddock writes: > How 'bout checking the reciprocity correction for ``long'' > (< 1/15-sec) exposures? Sure, it'll vary from film to film > but I haven't seen anyone mention this yet. Still, it might > be a good idea to verify that you may or may not need to > increase the exposure or add a filter here and there. Reciprocity corrections depend on knowing what the correct exposure is to start with. When you are using trial and error to determine the best exposure, there's no point in worring about reciprocity. Jim Winer ----------------------------------------------------------------- opinions not necessarily | "And remember, rebooting your brain and do not represent | can be tricky." -- Chris Miller any other sane person | especially not employer. | Brought to you by Super Global Mega Corp .com