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  1. Replies
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    Re: Recognizing dagor type G-Clarons

    Jody, the G-Clarons are very roughly parallel to Symmars. The original Symmars were dagor types, replaced in the 1950s by plasmat types. The VM says that the plasmat types were better corrected...
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    Re: Recognizing dagor type G-Clarons

    Thanks for the kind word.

    Comparing weights never occurred to me. I just looked at the catalogs, which don't show weights. One would have to get examples of all focal lengths of both types and...
  3. Re: Shutter swap - possible or not recommended..?

    #0 is #0 is #0. But and however all of the Copal #0 shutters I"ve seen have preview settings and "T"speed. I have a 90/8 SA paperweight that is in a Compur #00. No preview, no "T." OP, check...
  4. Re: Aspherical, Apo(chromatic) & ED (extra low dispersion) lenses - whats the differe

    Sigh. Another closet Marxist, confusing inputs with results. Another person taking marketing fluff seriously. ED glass may make reducing aberrations easier. Aspherical elements likewise. For...
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    Re: Aerostigmat 10'' 250mm f/4.5

    Karsten, are you sure there's an f/4.5 Tele Raptar? I ask because it isn't mentioned here https://alphaxbetax.com/wollensak-lens-and-shutter-compendium/ or in the catalog at pacificrimcamera.com.
    ...
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    Re: Aerostigmat 10'' 250mm f/4.5

    I have no experience with the Aerostigmat, but it is a tessar type that was designed in the 1930s. Aerial camera lens optimized for distant subjects. It should be a good enough lens but as...
  7. Re: Cambo 4x5...how to know how wide you can go

    Congratulations. Its what we all do.
  8. Re: Bellows Extension Factor & Flash Photography

    No, you can move the flash closer to the subject. Since you're shooting still lifes, you can also fire the flash four times to get double the exposure.
  9. Re: Bellows Extension Factor & Flash Photography

    Hmm. Are you acquainted with Guide Number arithmetic? To get more light (brighter) on the subject, position the flash closer to it. To get less light, farther away. You can also reduce...
  10. Re: Cambo 4x5...how to know how wide you can go

    That's right. If you look at the back, you'll see that it is what is called a reversible back. You can remove it -- same process as removing a lens board or detaching the bellows -- and rotate it...
  11. Re: Cambo 4x5...how to know how wide you can go

    You have set the camera up correctly. For set up, see https://static.cambo.com/Files/SC2_Manual.pdf

    If you reverse the rear standard, with no bellows fitted the two function carriers (the parts...
  12. Re: Cambo 4x5...how to know how wide you can go

    Not probably. Certainly.
  13. Re: Cambo 4x5...how to know how wide you can go

    Lou is right. I have 2x3 and 4x5 Cambo SCs. When the tripod mounting block is positioned between the standards it limits how closely they can approach each other. The solution is, as the OP...
  14. Re: A source of valuable data on French lens makers and their products.

    I agree. When I was deciding whether to write my Berthiot article I bought a copy of their Berthiot pamphlet. It too doesn't have a serial number. Their original idea of limiting the number of...
  15. Re: A question about focal length

    152 mm
  16. Re: What do you use to support your heavy, long, big and old lenses on your LF camera

    On my Cambo(s), I use a mutilated Cambo SC standard to support my heaviest lens, a 900 mm Apo-Saphir.

    On my failed Baby Bertha, I used an inexpensive lab jack to support a 2x3 Graflex RB Ser. B...
  17. Re: Voigtländer Petzval 3B 2 inch Diameter NEED HELP

    Prescriptions are normalized to 100 mm. For other focal lengths, multiply the 100 mm specifications (radii, thicknesses, spacings) by "other focal length"/100.
  18. Re: Voigtländer Petzval 3B 2 inch Diameter NEED HELP

    What do you think the first four items in the list are?
  19. Re: Voigtländer Petzval 3B 2 inch Diameter NEED HELP

    maxi, you can find prescriptions here: http://www.dioptrique.info/base/m/m_voigtlaender.HTM
  20. Replies
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    Re: Blocked from responding?

    We're not allowed to reply to for sale posts. Read the rules at the top of the for sale section.
  21. Re: What y'll know about cheap non shutter wide angle 75mm lenses

    Hard to find, not always too expensive, 75/14 Berthiot Perigraphe VIa.
  22. Replies
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    Re: Sinaron 5.6 / 210 mm Smallest Aperture

    Pardon me for jumping in. It isn't a question of wrong scales. Leaf shutters' diaphragms typically go from fully open to "very small opening." They don't have lens specific stops. For some...
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    Re: Compound shutter repair or replace?

    Jimbo, if your camera is a Speed Graphic -- it could be a Crown -- why don't you use the focal plane shutter?
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    Re: Are There New Shutters for Old Lenses

    Joe, thanks for the report.
  25. Re: Centre filters for UWA lens - rear element instead of front

    Drew, you may be thinking of the Reflex Nikkors (500 mm, 1000 mm and 2000 mm), which take small filters in the rear. They must be used with a filter in place. The filter set includes clear, red,...
  26. Re: Centre filters for UWA lens - rear element instead of front

    I wrote an article that addressed this. There's a link to it in the list. Read it. If you don't remember what the list is or where to find it, please ask.
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    Re: Are There New Shutters for Old Lenses

    Joe, I have a Calumet tester too. I'm not sure that it works with the aperture stopped way down. Haven't tried because I've sometimes had to put the light source close to the shutter. I recall...
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    Re: Are There New Shutters for Old Lenses

    A thought about leaf shutters. The conventional wisdom is that they run slow at higher speeds. This is usually based on measurements taken with shutter speed testers that measure the time between...
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    Re: Are There New Shutters for Old Lenses

    David, I've harvested Ilex #3 Uinversals from oscilloscope cameras and tachistoscopes. Most have been gummed up and useless as purchased but one, miracle of miracles, is bang on at all speeds...
  30. Re: SK Componon S 150/5.6 with 72mm filter thread

    The catalog says that the 150/5.6 Componon S takes M52x0.75 filters. The 210/5.6 takes M72x0.75. Perhaps the seller is confused about what he has.
  31. Re: Should I get a center filter for my 65mm Nikon-SW f/4 & 90mm Sinaron-W f/6.8?

    What a silly. You have the UV filter, you have the CF and you have the lenses. Why don't you just ask them whether they'll work well enough together.

    Y'know, the front of the CF's diameter is 86...
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    Re: Help with Super Topcor 5,6/120?

    It could also be on a board for a 4x5 Horseman. 160 mm claimed coverage, though.

    OP, if you want a not too expensive 120 mm +/- lens that covers 4x5, consider a 125/5.6 Fujinon-W.
  33. Thread: 20x24 lenses

    by Dan Fromm
    Replies
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    10,765

    Re: 20x24 lenses

    Algo, as a newcomer here you may not be aware of this site's resources. The first post in this...
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    Re: Carl Zeiss Jena Anastigmat 600mm f9

    Something later, the CZJ trade name Anastigmat was replaced by Protar before the Tessar was introduced. You don't have the OP's lens. Thorley's link in post #2 above was to a modern (post-WW II)...
  35. Thread: 20x24 lenses

    by Dan Fromm
    Replies
    48
    Views
    10,765

    Re: 20x24 lenses

    It is a process lens, won't cover 16x20 at infinity, let alone 20x24. Tessars aren't particularly symmetrical but it seems that Apo-Tessars -- mine are all Taylor Hobson tessar type process lenses,...
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    Re: Upgrading a lens shutter

    Louie, no couplers are required. You may have been thinking of swapping cells from a Graflex 1000 shutter -- the lens was supplied in that shutter too -- into a regular normal #1.

    It is a...
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    Re: A simple and practical 4x5 snapshot camera

    I wrote ebay.com, not ebay.fr
  38. Replies
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    Re: A simple and practical 4x5 snapshot camera

    ebay.com
  39. Re: why are there no "modern" super fast LF lenses?

    Re weights, see post #5 above. None of the lenses mentioned in that post will go into shutter.
  40. Re: Any tips on how to repair lenses with Balsam Separation?

    Try soaking in acetone.
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