It lets the camera know that you have advanced the frame to the correct "stop" to shoot a new frame. I believe it was an attempt to prevent multiple exposures. Eric Neilsen Photography 4101 Commerce Street Suite 9 Dallas, TX 75226 http://e.neilsen.home.att.net http://ericneilsenphotography.com > -----Original Message----- > From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver- > bounce@xxxxxxxxxxxxx] On Behalf Of Scott Hamming > Sent: Wednesday, April 19, 2006 7:42 AM > To: pure-silver@xxxxxxxxxxxxx > Subject: [pure-silver] Re: 828 film > > What exactly is the 'index' perforation and it's function? > > Scott > > >-----Original Message----- > >From: pure-silver-bounce@xxxxxxxxxxxxx > [mailto:pure-silver->bounce@xxxxxxxxxxxxx] On Behalf Of Koch, Gerald > >Sent: Wednesday, April 19, 2006 8:26 AM > >To: pure-silver@xxxxxxxxxxxxx > >Subject: [pure-silver] Re: 828 film > > > >My question was that I don't remember the index perforation being on > the > >828 film. > > > >-----Original Message----- > >From: pure-silver-bounce@xxxxxxxxxxxxx > >[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of David Foy > >Sent: Tuesday, April 18, 2006 7:29 PM > >To: pure-silver@xxxxxxxxxxxxx > >Subject: [pure-silver] Re: 828 film > > > > > >Hi Jerry. 126 "Instamatic" and 828 roll film both have film strips that > > >are 35mm wide, with one index perf per image. Unfortunately you can't > >use film from a 126 cartridge to re-spool 828, because the 126 film has > > >preprinted frame lines and numbers that would surely get in the way. > >David Foy > ====================================To unsubscribe from this list, go to > www.freelists.org and logon to your account (the same e-mail address and > password you set-up when you subscribed,) and unsubscribe from there. ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.