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View Full Version : 355 G-Claron direct fit to Copal 3 shutter?



iozone
20-Sep-2009, 10:15
I'm exploring my options for lightening/compacting my lenses. I'd like to know if a G-Claron 355mm in barrel will screw directly into any Copal 3 shutter without adapters or spacers etc..

Thanks

Richard K.
20-Sep-2009, 13:21
...I'd like to know if a G-Claron 355mm in barrel will screw directly into any Copal 3 shutter without adapters or spacers etc..

Thanks

As far as I know, yes. (other than Copal S 3)

Kirk Fry
20-Sep-2009, 14:16
Many Copal 3s shutters are NOT labled as such. I got fooled twice that way.

iozone
20-Sep-2009, 15:23
What makes a Copal 3s (or S 3) different from a standard Copal 3?

Peter K
20-Sep-2009, 15:45
What makes a Copal 3s (or S 3) different from a standard Copal 3?
The Copal 3S is a little bit smaller. As you can see here (http://www.skgrimes.com/products/index.htm).

Peter

iozone
20-Sep-2009, 18:21
Well, OK
I'm either reading S.K.'s data wrong or there seem to be some discrepancies. I suppose ultimately the size of the mounting threads and required lensboard hole should tell all.

The Copal 3 I have in my hand has a 61mm mount thread and requires a 64mm plus clearance lensboard hole. It isn't marked 3S anywhere. According to S.K. Grimes on both their chart and drawing this is a 3S.

I guess I'll try just a little bit harder.

Thanks Guys for the input,

Jon Wilson
20-Sep-2009, 20:00
I am not sure if you saw this thread of not:
http://www.largeformatphotography.info/forum/showthread.php?t=19838&page=4&highlight=kowa+graphic

In the last post, Ole indicates that some of these 355mm G-Claron's are threaded for the compound 3 shutter.

I have the 355mm G-Claron Repro and it is a direct fil in a compound #3 shutter.

Jon

Allen in Montreal
20-Sep-2009, 20:38
I recently asked Lens to Shutter the same question (mounting an Apo Ronar, and Artar or a G Claron into a shutter as there was a good deal on one of each on The Evil at that time). I ended up buying a Red Dot Artar in a shutter, but here is the reply.



"Hello Allen:

....... If that is the focal length you are looking for than may I suggest a 355mm G-Claron. A truly wonderful lens with huge coverage............it is a direct screw into fit in a Copal 3 shutter......"


I would think from that reply that setting the aperture scale would be the bigger task than the mounting.


Allen





I'm exploring my options for lightening/compacting my lenses. I'd like to know if a G-Claron 355mm in barrel will screw directly into any Copal 3 shutter without adapters or spacers etc..

Thanks

iozone
20-Sep-2009, 21:12
I am not sure if you saw this thread of not:
http://www.largeformatphotography.info/forum/showthread.php?t=19838&page=4&highlight=kowa+graphic

No I didn't. That's very informative. Even If I had the correct Copal 3 shutter it would then become an issue of trying to ascertain the thread on the G-Claron 355. I guess if I want a G-Claron 355 the easy thing to do is to shop for one in shutter, although they seem to have gotten quite popular recently.

Peter K
21-Sep-2009, 00:40
I'm either reading S.K.'s data wrong or there seem to be some discrepancies. I suppose ultimately the size of the mounting threads and required lensboard hole should tell all.
The main specifications for a shutter are the front to iris distance and the threads for front and rear cells. Also the maximum opening, from this depends the biggest f-stop.

The Copal #3 is compatible with the Compur #3, but as mentioned before the Copal #3s is smaller

The Copal 3 I have in my hand has a 61mm mount thread and requires a 64mm plus clearance lensboard hole. It isn't marked 3S anywhere. According to S.K. Grimes on both their chart and drawing this is a 3S.
Also the Copal #3 shown on Schneider's website (http://www.schneideroptics.com/ecommerce/CatalogItemDetail.aspx?CID=184&IID=1872) is a Copal #3s. The specifications can be downloaded from Schneider's german website (http://www.schneider-kreuznach.com/pdf/zubehoer/copal_3.pdf). Copal seems confused too, the title says "Copal No. 3" but in the drawings "Copal-No.3S". The Super-Symmar-XL-Asperic (http://www.schneider-kreuznach.com/foto/sr_su_xl_aspheric/pdf/z_sr_su_xl_asph_56_210.pdf) is an example for a lens mounted in a Copal #3.

Peter

iozone
21-Sep-2009, 09:07
The main specifications for a shutter are the front to iris distance and the threads for front and rear cells. Also the maximum opening, from this depends the biggest f-stop.

Peter, Of course you are right. Thanks for all the good information.


As an addendum I just found this on Kerry Thalman's web site: http://www.thalmann.com/largeformat/fujinon.htm

Copal S - this is the older style Copal shutter with a serrated, chrome speed setting ring. For an example of a Copal S style shutter, see Figure 2. above.


Could distinguishing the 3 from the 3 S be as simple as looking for the chrome shutter speed ring?