View Full Version : Copal 3 vs Copal 3s
Hi All,
Is there a large difference in mount size between Copal 3 and Copal 3s shutters? I have an older G-Claron 355 f9. I have had 2 Copal 3 shutters and both were much too large to mount the lens directly into the shutter.
My 305 screwed directly into the Copal 1...
Thanks, Steve
Oslolens
1-Apr-2022, 01:11
Copal / Compur / Prontor shutter inner threads: 58mm for #3, 56mm for #3S.
Identical front and back.
Sent fra min SM-G975F via Tapatalk
Lachlan 717
1-Apr-2022, 02:07
Short answer - they are not interchangeable.
linhofbiker
1-Apr-2022, 04:31
I have a Cinelux 120mm f/2 projection lens that has a 52mm ANAMORPHIC CLAMP recently attached. I would like to attach it to an electronic Compur #3. Looks like it would work because ANAMORPHIC CLAMP's outside thread is 58mm. Right now the Cinelux is attached to a Linhof early 4x5 board so I can see its effects on my 5x7 Linhof Kardan Bi. With it attached to the front of a #3 shutter may present infinity focus problems compared with the present 4x5 board approach. Not sure how practical the "top hat" exposure method would work with an f/2 lens, that's why I am looking at a #3 shutter.
woodlandSerenade
1-Apr-2022, 05:01
I have an older G-Claron 355 f9
The answer depends on the age of the lens. Early 355 G-Clarons are threaded for Compound #3 shutters and won’t directly thread into either Copal 3s’ or MOST Copal 3 shutters. I say MOST Copal 3’s because Schneider had Copal produce a #3 shutter to the Compound #3 mount spec, so even if you had an early 355, you could still have it directly mounted in a Copal shutter.
For a Copal #3 with Compound #3 threading, you'd be looking for:
Schneider Symmar Convertible 300mm f/5.6 in a Copal shutter
Schneider Angulon 210mm f/6.8
Schneider Tele-Xenar 360mm f/5.5 (with a front lens barrel that tapers toward the shutter)
There might be others. I have the 300mm and the 210mm, but as Compur #3 Electronic Shutters with Compound #3 threading.
Len Middleton
5-Apr-2022, 09:22
I have an older G-Claron 355 f9. I have had 2 Copal 3 shutters and both were much too large to mount the lens directly into the shutter.
Thanks, Steve
Steve,
My 355 f9 Repro-Claron lives in a Compur 2.
There were some other Schneider lenses from that period that used Compur 2s as well. The solution at the time when the Compur 2 was discontinued was to use a Compur 3 with reducers to make up the difference in thread size (and pitch?).
Hope that helps,
Len
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.