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aly324
15-Sep-2019, 14:06
I picked up a lens in Sinar CMV mount and am trying to remount it to a Copal.

But the front element is stuck in place. A rubber wrench is no help.

Does anyone know if there's glue or some kind of mechanism keeping the front element in place in a CMV mount? Thank you.

Jim Noel
15-Sep-2019, 14:30
Have you tried a radiator hose clamp?

aly324
15-Sep-2019, 14:57
Thanks for replying Jim. Not yet. I've only used a rubber lid gripper. I wrote "rubber wrench" but it's really a lid gripper. A rubber wrench would be stronger I think.

I am willing to try something even stronger like a radiator hose clamp, but I wanted to make sure it's not actually held in place by something else first.

Jac@stafford.net
15-Sep-2019, 15:01
Are you certain there is not a tiny screw to discourage the lens movement?

aly324
15-Sep-2019, 15:28
Thanks Jac. No screws visible from the outside.

I've opened up the shutter and also don't see any screws keeping the front element in place.

Attaching a couple of photos in case they help. Thanks again.

From the first photo you can see there's a black ring behind the front element. I don't suppose that locks the element down?