You should be able to add a switch activated by the same gear that returns the mirror after the second curtain closes. Note that you will need to keep the FP switch, as it acts as a safety switch in the X synch circuit - just disconnect it from the FP socket.
It'll just take money, no problem. ------ Robert ----- Original Message ----- From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, January 02, 2004 8:25 PM Subject: RE: Re[2]: OT: why trailing-curtain-sync is useful > > For a while I've been thinking that one of these days I need to > take a close look at the exploded diagram of an S3 or S1a to see > whether it'd be feasible to modify it to use trailing-curtain > sync. (They've got two PC sockets -- "X" and "FP" -- so as long > as I never intended to use flashbulbs with that particular body, > I could wire trailing-curtain to the "FP" socket, assuming it's > possible at all.) I need to check for clues in the slow-speed > timing mechanism. Something needs to happen there just before > the shutter closes, consistently enough to be usable at several > speeds, that I can poke a wire at. >
