Got my 90mm F8 super angulon, but few questions
I was very happy after I got this lens, however, after a closer examination, I found a few scratches (tiny, have to shine light on it to see, otherwise doesn't visible), and slight haze on both ends of the lens. I think the haze is inside of the lens. So, I started worry, and then I found the shutter is not copal shutter as the seller mentioned, it's a synchro-compur shutter! what a bum.
My question is:
How a compur shutter compare to copal shutter? Can they use the same lens board?
If I decide to keep the lens, where to find a place in new york area to get rid of the haze?
and I am pretty sure it's single coated, right?
Thank you in advance.
The scratches, haze, and compur shutter wouldn't be a problem for me. The haze could probably be cleaned by unscrewing both the front and rear elements if you are anal about it. You probably will never see any detrimental effects on a print.
I'm not an expert in this but from reading others who are... The scratches are not a problem. The haze I am less sure about, depends what and where it is I guess. IIRC, Schneider lenses say "MC" or "Multicoated" if they are. If not so marked, it's single coated (or uncoated if old enough). The Schneider web site will tell you how old the lens is from the serial number (http://www.schneideroptics.com/info/age_of_lenses/).
Shutters: Copal/compur some people prefer one over t'other but I don't think it really matters. Size: from the Schneider site, single coated lenses were in either #0 or #1 size shutters, MC are all in #1 size. Shutter sizes are the same for any shutter (the actual hole sizes are on the SK Grimes site somewhere).
My 90/8 Super Angulon is a very nice lens, and I use it quite often on 5x7"! Mine is single-coated.
Some early 90/8 Super Angulons were in 00 Compur shutters - I know, because I have one. They then found that the shutter was too weak for the size of the lens, and changed to size 0. They were never in #1, but in the 0+1 which is a tube length specification for a #0 shutter.
Shutter sizes for 0 and 1 are the same, other sizes are a bit more variable.
-- Ole Tjugen, Luddite Elitist
I think you got stiffed - if it was described as being in a Copal, it would have been a later model than the ones found in Synchro Compur shutters. In my book, that is deceptive selling and you should ask for your money back. The haze is a worry too.
I have one of those 90mm SA lenses in the Synchro Compur shutter. It performed very well until the shutter fell to pieces - an incredibly sharp lens. I could not get another shutter for it, so it sits in my spare room doing nothing these days.
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At least one of the early 90mm S/As used a shutter size called "0+1". The same is true of the 121mm S/A.
Originally Posted by Bob F.
Ole - by 'tube' do you mean the lens spacing is different? If that's the case, then the OP might have more trouble than he thought. No?
Originally Posted by jjstafford
I'm at work now and can't check my library for a few weeks, but that might be true. On the other hand it is quite possible that the 0+1 became the standard #0, so I'll have to check the literature on this.
Graemes shutter which "fell to pieces" sounds like it could be a #00, that's why they changed to 0+1... Graeme, fiddly little thing you could barely get a finger on, deep under the conical front?
There are two ways to get these repaired: S.K. Grimes will mount in a new shutter, making whatever adapters are necessary. Schneider will say "this lens is a very delicate instrument which requires very careful alignment that only we can do. The shutter is long oput of production and there are no spares available". A full Schneider repair will cost almost as much as a new lens, and often more than another used lens.
BTW, that's what Schneider told me when I inquired about a replacement part for the shutter on my 121/8 SA, which only opens up to f:10. I even quoted the part number that should be replaced!
-- Ole Tjugen, Luddite Elitist
I would first clean both ends of each lens cell with a microfiber cloth and see if that takes care of the haze. If not, and the haze is inside the cell, then you would have to send it to someone who can disassemble and clean it, if it is serious enough to worry about (which it may or may not be).
If you've got a Synchro-Compur 0 shutter, that should be fine, and it will fit in a Copal 0 lensboard. If you have the 00 shutter, it might be better to send it back.
I would send it to S. K. Grimes or Frank Marshman if it needs repair. I'm not terribly enthusiastic about any of the shops in New York for LF repairs, though in theory they shouldn't be difficult.
I can take a look at it if you want. If I remember correctly, you work at CCNY? I live at 125th and Riverside. PM me if you want to drop by.
I may be in the minority here, but I think that the build quality of the Synchro Compur is better than the Copal. The downside is the availabilty of new parts. On the bright side, most shutter problems are caused by dirt and a simple cleaning is all they usually need. The one possible exception is if the shutter has seen a lot of hard use and the slow speeds escapement is shot. Still, it takes a long time and a lot of abuse to kill a Synchro Compur.
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