Shutter slows to a snail's pace in cold weather : LUSENET : Large format photography : One Thread

My old synchro-compur shutter failed me today in temps of about +20 degrees F. as it slowed right down to a snails pace. Is this typical for this shutter? Does it just need to cleaned and re-calibrated? It's a very old shutter and I'm wondering just how far to go with repairs/expense.

Thanks in advance....

-- Craig Uecker (, January 13, 2001


You can get these cleaned/recalibrated by Mel Pierce in Hollywood for about $90. Regards, Pat

-- pat krentz (, January 13, 2001.

I have experienced that same problem with Compur shutters in about 0 F temp. Since then I have replaced those lenses with Copal shutters and although I rarely shoot in such weather, I don't recall having such problems with Copal shutters.

-- Richard Stum (, January 14, 2001.

It's been my (limited) experience that Compur shutters haven't been any good since they re-styled them in the 1970s. Copal, I'm sorry to say, rules, OK.

-- Pete Andrews (, January 15, 2001.

I doubt whether it's an issue of whether the shutter is a Compur or a Copal that is causing the problem. It is probably just due to it being older, and having some dirt or oil congealing. Someone in the past may have inappropriately oiled, or overoiled, it. A good cleaning with minimal, proper, lubrication may be all it needs.

-- John H. Henderson (, January 17, 2001.

I'm a big fan of replacing the older and older Compur shutters with nice new Copal shutters. It can save time and trouble to just replace it with new. The iris scale must be made up or gotten from the lens manufacturer. (I include iris scales on the shutters I supply.)

See: for info about Copal shutters.

(Please note I am not associated with the company in Boston called: "S.K. Grimes Camera Repair")


-- steve grimes (, January 21, 2001.

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