Perhaps I should have cut out everything except the line I was replying to. Yes I know that modern cameras, (since at least 1940 something advance the film and cock the shutter at the same time). Some allow you to cock the shutter without advancing the film to facilitate multiple exposures but that's another story.
At 04:42 PM 9/19/2002 +0100, you wrote: >The shutter is cocked either independantly or by movement of the take up >spools. It has nothing to do with film advancement unless really old >cameras do it this way (I would be surprised). My Zenit E and P30T both >recock the shutter even if there is no film in them. > > > -----Original Message----- > > From: Peter Alling [mailto:[EMAIL PROTECTED]] > > Sent: 19 September 2002 16:36 > > To: [EMAIL PROTECTED] > > Subject: RE: Silicon Film is still alive... (??????) > > > > > > Don't think of it as advancing the film. Think of it as > > cocking the shutter. <snip> > > >What I find even more interesting (in a sad way) is that > > older cameras > > >will still require the user to manually wind on after taking > > a digital > > >picture!!! I find this rather amusing and quite cool! > > > > > > > > > > > > > -----Original Message----- > > > > From: Jostein [mailto:[EMAIL PROTECTED]] > > > > Sent: 19 September 2002 08:42 > > > > To: [EMAIL PROTECTED] > > > > Subject: RE: Silicon Film is still alive... (??????) > > > > > > > > > > > > Curiosity still not satisfied. > > > > This is what I've found so far: > > > > Any film canister will return an error when loaded if the camera > > > > (Z-1) doesn't pick up the lip of the film. > > > > > > > > I still don't know the exact way the camera recognise a film > > > > canister for what it is, but the DX coding as a single > > factor can be > > > > ruled out. A Kodak HIE without DX coding produce the same > > response > > > > as do a DX coded film. I also got the same response if I > > covered the > > > > entire canister with tape or paper. > > > > > > > > However, the check for presence of film doesn't start > > until the back > > > > lid is shut. When shut, the back lid puts a bit of > > pressure on the > > > > canister to keep it in place. If that's significant, the DX code > > > > contact points may still have a part to play. They are the only > > > > movable parts in the film compartment. My current theory > > is that as > > > > they are pushed back by the film canister, they short a > > "presence" > > > > cirquit. > > > > > > > > The Z-1 has other contacts that could be used to confirm that the > > > > back is in fact closed. > > > > > > > > Ok, this is guesswork, but I think it's a qualified guess. If i'm > > > > right, it means that an eFilm would need grooves to avoid > > depressing > > > > the DX connectors to work with Z-1. It could be that it's still > > > > possible to read the DX code, though. > > > > > > > > Jostein > > > > > > > > > > > > ---------- Original Message ---------------------------------- > > > > From: "Jostein" <[EMAIL PROTECTED]> > > > > Reply-To: <[EMAIL PROTECTED]> > > > > Date: Wed, 18 Sep 2002 13:31:25 +0200 > > > > > > > > Not sure about the camera "thinking" it's empty. > > > > With the Z-1, you have to pull the film lip well to the > > right of the > > > > shutter window before the camera tries to wind it on. > > OTOH, I have a > > > > suspicion that this might also have something to do with the ISO > > > > recognition system... > > > > > > > > Now you got me curious. Got to check out a few things > > with the Z-1 > > > > when I get home from work. > > > > > > > > Jostein > > > > > > > > > > > > ---------- Original Message ---------------------------------- > > > > From: "Rob Brigham" <[EMAIL PROTECTED]> > > > > Reply-To: [EMAIL PROTECTED] > > > > Date: Wed, 18 Sep 2002 11:19:06 +0100 > > > > > > > > >Actually, you are right although I do still wonder. The 'dry- > > > > firing' I > > > > >should have thought of is a good point, but will a camera 'dry- > > > > fire' > > > > >with a film canister inside the camera? Surely it would try to > > > > load a > > > > >film and when unable to do so, signal an error? This could be > > > > the key - > > > > >how does the efilm make the camera think it is empty? Also, it > > > > would > > > > >then only work with cameras that had manual ISO setting? How > > > > many entry > > > > >models does this count out (not that I am worried). Frame > > > > counting is > > > > >not really an issue when you can zap old frames and they are all > > > > >different sizes - only memory usage left. > > > > . > > > > > > > > . > > > > > > > > > > > >
