Convert Copal 3 shutter back from Compur 2 bushings?

[digital_archivist]

I have a convertible Symmar 240 f/5.6 mounted in a Copal 3 shutter. i’ve tried mounting my Symmar-S version of the 240 5.6 lens into the shutter and it isn’t even close; the lens is much larger than the threads of the shutter.

I’ve read that the convertible Symmar actually mates to a Compur 2; when these lenses are mounted in a Copal 3, bushings are used to enable them to fit.

Can anyone confirm this? If this is true, can the shutter be returned to a plain Copal 3? I don’t really need the convertible Symmar - what I need is a plane-Jane Copal 3 (not 3s) shutter for another lens.

 

[xkaes]

Copal #3 shutters are easy to find with a lens, harder to find alone, and impossible to find at a really good price -- unless in need of repair. like mine was.

For adapters, you could try some of the shops on the bottom of this page -- RAF has lots of shutter adapters.

http://www.subclub.org/fujinon/

 

[Dan Fromm]

I have a convertible Symmar 240 f/5.6 mounted in a Copal 3 shutter. i’ve tried mounting my Symmar-S version of the 240 5.6 lens into the shutter and it isn’t even close; the lens is much larger than the threads of the shutter.

I’ve read that the convertible Symmar actually mates to a Compur 2; when these lenses are mounted in a Copal 3, bushings are used to enable them to fit.

Can anyone confirm this? If this is true, can the shutter be returned to a plain Copal 3? I don’t really need the convertible Symmar - what I need is a plane-Jane Copal 3 (not 3s) shutter for another lens.

The 1964 Symmar brochure says that the 240/5.6 -- this is the convertible -- fits a Compur II 5/2.

OP, your 240 convertible's cells may have been made to fit a III or may have been adapted, as you hope, by threaded bushings. Three possibilities: bushings in the #III, bushings on the cells, cells direct fit in a #3. You should be able to decide which it is by examining shutter and cells.

You're a long term lurker here, so you might be aware of "the list." It has links to info on Compur shutter types and their dimensions. If you don't know what the list is, ask.

 

[digital_archivist]

Thank you both. I have a known good Copal 3 (not 3S); I’ll compare the odd variation with the convertible Syllar to the good shutter and see how they’re different.

Thanks again!

 

[Chuck1]

You have 2 240mm lenses?
As dan said the older one fits compur 2 shutters.
The more recent edition fits a copal 3.
If you are looking for a copal 3 shutter be aware there are copal 3s shutters marked only copal 3, these would be too small
If you don't need the one that fits the compur 2 I would be interested,
Is the glass good?

 

[digital_archivist]

I don’t need the convertible Symmar; it came with the shutter I bought (looking for a Copal 3). I believe the glass is good; I’ll take photos later today.

I don’t suppose you’d have a Copal 3 (not S) shutter to trade?

 

[Chuck1]

Nothing that large, 2 is my biggest

 

[digital_archivist]

Worth a try. Thanks!