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The lens will have to cover ~ 300 mm at infinity. Many, many candidates. I'd use a process lens, speed isn't needed, a small aperture is.

Focusing issues. Camera on wheeled stand.

DoF...

Here https://skydrive.live.com/redir?resid=8D71BC33C77D1008!324 is a link to a collection of information on Rodenstock lenses. Brochures courtesy of Bob Salomon of HP Marketing, with help from Paul...

http://www.ebay.com/itm/VERY-SHARP-210m-FAST-WIDE-ANGLE-8-RANK-TAYLOR-HOBSON-LENS-ENGLAND-5X7-8x10-/221242261207

The lens' native habitat is a Xerox machine

About the diaphragm's position in Compur/Copal standard cock-and-shoot and press shutters, see http://www.skgrimes.com/products/new-copal-shutters for the standard dimensions.

Short version, press...

Be careful when you unscrew the trim ring. It could very well retain the glasses in the barrel. The barrel appears to be in one piece, with no diaphragm. This is not a good sign.

Um, the 90 SA's flange focal distance is, depending on the model (f/8, f/5.6) and vintage (coated, multicoated), between 98.8 mm and 102.7 mm.

I'm sorry that I don't have a Super Graphic to...

On dear, oh dear.

A 120/4.5 Tessar won't cover 4x5.

The Polaroid 800's lens and shutter are integral with the front standard. To use the lens/shutter assembly you'll have to put the whole...

Um, Reinhold, aren't you acquainted with arithmetic? The theory's well-known and well-validated, you don't have to measure (if the focal length is what you think it is), you can calculate extension.

Ian, B&L made Compound shutters under license.

EKCo differentiated clearly between B&L ZKAs -- dropped the name in 1915, with WW-I -- and CZJ Tessars.

Ian, EKCo made a variety of grades of Folding Pocket Kodak. The Special was the top of the line.

Go take a look at some of the catalogs on Mario Groleau's site. The link is in post #2 in this...

Ian, the 170/6.3 I mentioned above is engraved "Made by Eastman Kodak Co. Rochester N.Y., U.S.A." I can't date it, but it had to have come from a #3A or #4 FPK. The #3A with 170/6.3 in Ilex was...

See http://www.dioptrique.info/base/m/m_kodak.HTM for some Kodak lens designs and patent dates. The earliest is 1915.

Also see http://www.bnphoto.org/bnphoto/KA_KASIntr.htm and...

Zeiss licensed B&L to make lenses unders Zeiss patents. At the time B&L was, I think, major manufacturer of photographic objectives in the US.

EKCo was one of B&L's customers. B&L had other...

Ridax, read the paper carefully. It makes the point that the Russars evaluated were far off specifications and were, in particular, badly centered. I'm surprised that imperfect mapping lenses were...

Steven, it could be a scanner or machine vision lens.

If we're lucky, Ian will buy it and give us a report on it.

Ridax wrote:



Interesting, if true. Here are two observations that disagree with you:

First, some years ago a number of 200/6.3 Orions (Ia, I think, could be mistaken) came to market. ...

Ian, the 1971 Yakovlev catalog, pp. 368 ff, reports that at f/10 the RF-5 resolves 35 lp/mm at the center, 15 lp/mm in the corners. Stopped down a little it is usable on 2x3. Claimed coverage is 43...

MB, there have been extensive discussions on www.graflex.org about making cams for top RF Crowns. Have you been there and read them?

Interesting. I thought Magnogon was a Staeble (Agfa's captive lens maker) trade name. Which barrel? The one the cells came in or the one you put them in? Please share your Linos info with us.
...

Congratulations on a wonderful snag.

I have the impression that "the guy" sold you a lens that, in US parlance, had fallen off of a truck. If so, be careful.

In the US many rules vary from...

Yes, that's the one. A 127/4.7 Tominon, ex-Polaroid CU-5, shot better on 2x3 than the 5" Aviar did. And its diaphragm was jammed. I told Jim that if he didn't accept it I'd toss it, also that if...

Thanks very much, Louis

Roger, TTH coated nearly every lens they made starting sometime in 1944. As part of last year's spring cleaning I gave Mr. Galli a coated 5"/4.5 Aviar (Ser. II, I think), s/n 292229.

Cheers,
...

Oren, thanks for the link to the vanished Schneider archive.

I'm ashamed to admit that I didn't think of using the wayback machine to find it. I did use the wayback machine to find the Rodenstock...

Lyle, you should ask people who don't have your lens whether you should keep it. You should ask the lens.

Links are ephemeral. There’s no guarantee that any of the links below still works.

Information given on the sites listed is, in general, incomplete and inconsistent. If you can’t live with...

http://www.cameraeccentric.com/html/info/zeiss_3.html

http://www.arnecroell.com/czj.pdf

The catalogs at cameraeccentric contain the answers to many, many questions. Look there before asking.

Ian, don't be silly. It covers 6x6 at 1:1 and that's it. Cuts off sharply. The MTF plots bring to mind a wide angle lens with a field stop.

I understand wishful thinking, I suffer from it...

Bob, you're as right as could be and no more precise than necessary. I've never understood why the third digit matters in photography ...

Try Frank Marshman, Camera Wiz, in Harrisonburg, Va.

Around 1951, not "late 1950s." Starting in 1952 Berthiot serial numbers started with letters. I've never seen a Perigraphe whose s/n began with a letter; this proves nothing, but I suspect...

Why carry the 203 Ektar and the 210 G-Claron? I'm surprised that y'r 203/7.7 covers 8x10, there are claims of only 216 mm (see http://www.bnphoto.org/bnphoto/KodakEktarsDB2.htm) but not from EKCo. ...

Ian, even though you'll be shooting well stopped down a large maximum aperture makes focusing and composing easier. I just recently shot a 1.75"/2.8 Elcan against a 45/9 CZJ Goerz Dagor, have seen...

"/|\" is the "broad arrow." It indicates that the item bearing it is crown property.

Ian, reread my lens diary. The answer to your question is there. To help you think about it, a 110 mm lens has to cover 87 degrees to cover 5x7. Wishful thinking won't make a 110/6.8 Perigraphe...

As long as the thread has drifted to hanging lenses in front of shutters and shutters in front of lenses, some of you may want to visit my lens diary, which has a long discussion of hanging lenses in...

You should have told us what you were trying to do.

If you'll search, you'll find a number of long-running threads on making an LF film scanner that contains a DSLR. Look for the discussions.

The Nikon BR2 and BR2A Inversion Rings (that's Nikon's name for them) have 52 mm male filter thread on one end and male F-mount on the other. To reverse mount an enlarging lens on an F-mount camera,...

Rick, those B&L lenses from Xerox machines were 8 1/4" inchers, stopped down to f/11 or so.

About lenses for Xerox machines with diaphragms, many of the B&L lenses extracted from Xerox machines have 'em.