Is that a copal 3s?
I have a friend who got a fujinon 1200A but the shutter has some problem. And find out that the shutter is slightly smaller than copal 3. That has to be copal 3s, right? Does copal make any different variation beyond copal 3s? Without measuring the opening how can you tell the difference between copal 3 and copal 3s?
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