Super Angulon 47mm f/5.6 XL not screwing into Copal 0 shutter properly

[EdSawyer]

it should fit, copal #0s of that vintage are basically universal. Post pics with the cell mounted.

[senderoaburrido]

It was the same one that I received with a 58mm Super Angulon XL. I figured that since they were so close in focal length, and shared a shutter size, the shutter would be interchangeable.

[EdSawyer]

they do, and it is. something else is amiss, not the shutter most likely.

[senderoaburrido]

So there is a significant difference between the barrels, which explains why one does not screw in all the way.

I checked the threads, and they're fine.

I've included a picture of the 47mm screwed into the Copal 0 Press Shutter, to show how flush the cone of the front has to be in order to go in all the way.

Lastly, I tried to remove the front guard ring from the Copal 0, and I realized it has small hooked inserts that fit in an indentation along the outer ring where the shutter speeds are etched. It is also aluminum, not plastic. It still spins freely.

[EdSawyer]

Here's what mine looks like.

[senderoaburrido]

Yeah, Ed, the front guard ring on yours looks slightly different from my own.

[Jac@stafford.net]

[... snip good article ...]

If all that fails, take a Grip Thread Pitch Gauge to identify the thread types, that have to be matching. If (very rare) not matching someone made custom threads... because a copal 0 is a copal 0...

Thanks for that, Pere.

It is a good idea for any DIY person to own a good thread gauge and a good caliper. I finally got a Mitutoyo after being admonished by an expert machinist (glennview.com) regarding my sloppy measurements.

Use the instruments to inform yourself, and the rest of us so we can help.

[LabRat]

Also, remove front or rear element at a time, and open shutter + iris one at a time, to make sure that the elements are not bottoming out in the shutter somewhere (possibly due to a missing spacer, etc)...

Steve K

[Jac@stafford.net]

I just took my 47mm SAXL from storage, and the lens clusters fit perfectly. Note that since a drastic mistake in my youth, I only 'snug' lenses into the shutter - light finger tight is all one needs. I wonder of our OP has acquired abused threads or mismatched lens groups. Is the later even possible?

I am sympathetic to this particular thread and hope it never happens to anyone else.

[EdSawyer]

it seems like maybe Copal swaps out that front trim ring piece for a different one on shutters designed for the 47XL. I wonder if such a part is available separately? perhaps. Manually machining it might be another more drastic option. But the chances of finding a copal 0 designed for a 47XL without the lens cells seems like a hell of a long shot...