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christopher walrath
19-Feb-2009, 11:00
I just got a new G. A. S. stresser from ebay. It is an f/4.5 6 1/2" (by the math, J's rigatoni test proved about 13") Bausch and Lomb barrel lens, the pic is here (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=370155843968#ebayphotohosting). The filter threads (front and back) are 62mm. Two elements with aperture range from 4.5-32. Retaining ring thread is about 67mm and the ring flange OD is about 80-81mm. There are five equidistant countersunk mounting holes around the face of the flange.

What shutter would my G. A. S. need in order to be satiated?

Steve Hamley
19-Feb-2009, 11:29
One that a machinist fits it for. Old barrel lenses usually weren't designed to fit in shutters, much less shutters that were designed decades after the lens. For a 14" f:4.5 Tessar you'll need a Compound #5 and about $350 worth of machine work. A Betax or Ilex #5 might also work.

Cheers,

Steve

Dan Fromm
19-Feb-2009, 12:10
Christopher, if you're going to shoot 4x5 with it, front-mounting is another possibility to explore. Front-mounting adds extension (hint).

Alternatively, there may be a long Graflex in your future.

Ken Lee
19-Feb-2009, 13:11
The Sinar Shutter (http://www.kenleegallery.com/html/tech/index.html#Shutter) lets you shoot barrel lenses to your heart's content.

Some forum members have mounted a Sinar Shutter on other cameras, including wooden field models.

I use mine on a Sinar P, and have several barrel lenses. These days, I use vintage lenses much more than new ones, on 4x5 and 5x7.

Almost every photo on this page (http://www.kenleegallery.com/html/recent) was made with the Sinar Shutter and vintage lenses, many of which are in barrel. Since it gives accurate exposures up to 8 seconds, it comes in very handy when doing close shots, with lots of bellows extension.

Many older lenses don't offer great coverage or color correction - and they aren't always small and light - but those criteria are important for architectural, flat field copy work, and landscape photography in the field. For portraits and close-ups, vintage lenses can be just as good, if not better.

Jim Galli
19-Feb-2009, 14:03
Chris, I think what you've bought is an 8 1/4" 5X8 Bausch & Lomb Tessar. Get some slow film and stop it down. Use it a bit and see if it's anything you're willing to spend big $$ on for shutters and the like. Did you see the piece I posted (http://www.largeformatphotography.info/forum/showthread.php?t=46034) earlier this week about the B&L tessar's?

vickersdc
23-Feb-2009, 05:34
Chris, I see you've been busy whilst I've been away!! Forget shutters - cut some photographic paper, expose at ISO 1.5(-ish) and use a lens cap for a shutter. The exposures at f16+ will be several seconds anyway.

See what I learnt to do in France with the Pony Premo..?!

Archphoto
23-Feb-2009, 06:45
Ken: great shots !

Using the Sinar shutter is the best way to go and you don't need a shutter for each lens that passes by....

If got a P2, so that (mechanical) shutter will be on my wishlist !

Greetings,
Peter

Ken Lee
23-Feb-2009, 07:56
Thank you Peter. Yes, unless you plan to travel long distances on foot, the Sinar is a great option.

My used Sinar P cost less than a new field camera, and less than many other used cameras too. The cost of a used Sinar Shutter, is roughly equivalent to the cost of having one lens mounted in its own shutter, by a professional. I am grateful to Igor's Camera Exchange (http://igorcamera.com/sinar.htm) for making me aware of this combination.

And of course, thanks always to Jim Galli (http://tonopahpictures.0catch.com/) for promoting the beauty of vintage lenses.

If money is not the only consideration, mounting the lens in its own shutter may be the best option (http://www.skgrimes.com/fits/index.htm), since it lets you use the lens on any view camera or field camera.

Archphoto
23-Feb-2009, 08:26
If you have just a P2 and no Field, the Sinar shutter is the best option money wise if you want to use some old lenses.
I have one old brass lens, covers 5x7 inch, it is in Holland and I am in Brazil, that I would like to use on my Sinar, just to see what I can do with it.
Going the papertrail at first would be an option as mentioned above.

Got a lot of nice things to try-out when I am back in Holland for a holyday !!!

Peter

Martin Miksch
26-Feb-2009, 03:27
pics show a 5x7 Seneca competitor view with built-in sinar shutter, it works perfect.
Regards
Martin

Ken Lee
26-Feb-2009, 04:40
Brilliant !