> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of > [EMAIL PROTECTED] > > > In a message dated 7/24/2002 2:15:12 PM Central Daylight Time, > "tom" <[EMAIL PROTECTED]> > writes: > > > In particular, I think there three aspects of your > experiment which > > are questionable: > > > > - - your metering method > > - - your definition of film speed > > - - the lack of a control film > > > > Not true..his objective was only to show a relative > increase in speed,
Relative to what? There was no control film. > as > measured by changes is the range of film densities, due to > what he defined as > "push" processing. The actual speed of the film, metering > accuracy, > etc...are irrelevant in this scenario... I don't understand how metering could be irrelevant - it seems to me it's the crux of the experiment. If the shutter speed/aperture combos he used were correct for 100, 200 and 400 rather than 400, 800 and 1600, then his pushed frames would actually be correctly exposed but overprocessed exposures. Such exposures would be expected to be dense, but with adequate shadow detail and easily printable. tv - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
