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[David_nebenzahl]

The immediate problem that inspires this posting is a Zorki-3M which sometimes misfires on B: one time out of ten or so, it fires as if on a slow fast speed (say, 1/25th) instead of staying open until the shutter button is released.
 
The apparen

[Prasanna]

You may want to read Rick Oleson's site. He has posted details and diagrams on the Zorkis. Just Google Rick Oleson or . Regards, sp

[David_nebenzahl]

Thanks; I know Rick, and have emailed him in the past on several occasions. His site is indeed invaluable and a wealth of information, and he's a very generous guy. Unfortunately, he doesn't have what I'm looking for--an explanation of how exa

[David_nebenzahl]

Well, looking again through Rick's site, I did find this page, which explains how these FED/Zorki shutters work in general. However, it doesn't have the detail I want on how the damned me

[Harryrag]

There is also this one http://jay.fedka.com/ Maybe it is of some help.

[Rick_oleson]

does this help at all?
 
http://rick_oleson.tripod.com/leica.pdf

[David_nebenzahl]

Are you kidding? That's just about exactly what I was looking for. (I think I've seen that somewhere on your site before but forgot about it.)
 
In case there's any question about it, just remember: You Is Da Man.
 
Getting back to my or

[Rick_oleson]

it might be too weak in the in direction, so the thing just blows it out of the way.  also if the pawl is buggered up, it might not have the correct shape at the edge to get a good grip.

[David_nebenzahl]

Well, turns out that the spring was indeed the cause of the problem. It was too weak pressing in on the release pawl, and after re-bending and replacing it, the camera works reliably on B. Shows how sensitive these cameras are to the proper tensioni