>...but why would a PMT > get “more” > > light, > In semiconductor sensors, however, many, perhaps most, of the > photons that hit the junction do absolutely nothing, so they're much less > sensitive.
Hi Paul, I’d believe that PMTs have a much lower noise floor than CCDs and that is the reason for the much higher dynamic range, and obviously better shadow detail. Is that what you are talking about? As far CCD sensitivity...CCDs have a minimum number of photons before they can “register”, but I believe that once that level is reached, “most” of the photons that hit the sensing area are being “counted” (accumulated)...I don’ t believe they are doing “nothing”? Regards, Austin ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
