Newest model Compur 3, T Trouble

[Corran]

I just got a lens that uses a newer Compur #3 shutter, the one that looks just the like electronic shutter. But not electronic. Like THIS.

Everything looks mint and works beautifully save the T function. However, I've never had a shutter like this so I figured I would ask. On the older Compurs you don't cock the shutter for T (or B, but this shutter has no B) but this one it seems you do? However, when I depress the shutter release it doesn't do anything. It makes a vague click sound, like it hit something but didn't trigger. The shutter blades don't move and the red "flag" is still up. I can move the shutter speed dial to 200 and fire it fine. Using a release cable does the same.

Am I doing something wrong or is this an internal issue that needs a servicing to fix?

[koh303]

Could be the preview lever (internal actuator) is stuck.

[Corran]

Hmm.

Well I was fooling with it again and I noticed that when I move the selector from 1/200 to T, the preview lever moves lightly left. So I pushed the lever to the right and held it there, which made the T setting trip, but instantaneously like it was on 1/200.

So it definitely seems to be an issue related to the preview lever. Is the lever supposed to move when T is used?

[Ari]

Is the lever supposed to move when T is used?

Mine does; I have an older version with a silver ring, but when the diaphragm is closed and I switch between 1/200 and T, the lever moves.
The shutter works perfectly, btw, so I don't think you have any cause for concern.

[Corran]

Thanks Ari. Well the T doesn't do anything so I wonder what else it could be. I guess a service would fix it.

[Ari]

Thanks Ari. Well the T doesn't do anything so I wonder what else it could be. I guess a service would fix it.

I'd agree with you there, Bryan; the T should be working, so send it in if you can.
A fine lens like that deserves red carpet treatment.

[animaux]

@Corran were you able to resolve the issue? I have the exact same problem.

[Corran]

Nope I sure wasn't. It needs service, but I have been using it as-is since.

[animaux]

Thanks, will probably do that too. Had another look inside just now and can imagine what the levers SHOULD do in T-mode, but have not yet grasped what part is not doing its part. I wish there was a video of a working Copal 3s insides, or at least som images. But sadly its all older and smaller versions.

[Luis-F-S]

My older silver rim Compur 3 have T and no B setting. My newer all black Compur 3 have a B and no T setting. They work exactly the same. They open and close and are made to be used with a shutter release. It's not a problem, it's the way the shutter is designed to work.

L