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    Re: Using slide-in filters mounted on lens

    Hmm. I hang lenses in barrel in front of shutters. The largest and heaviest I do this with is a 610/9 Apo-Nikkor, which I hang on a Copal #1. 1,450 grams plus the adapter's weight. I was...
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    Re: Krauss Quatryl

    erian, I bought the Le Reve Berthiot Opticien when deciding whether to write an article on Berthiot's LF anastigmats. I found it incomplete and sometimes inaccurate, so went on to write a more...
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    Re: Indexing Outstanding Forum Threads

    Suggesting that someone (not the suggester) do the work is easy. Sorting the scarce wheat from the abundant chaff, not so easy.

    Neil and Papi, you should collaborate.
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    Re: Basic Question on Iris Scale

    Press shutters have the same tube length as comparable cock-and-shoot shutters. Their diaphragms, however, are somewhat closer to the rear of the rear tube. Some lenses whose rear cells go deep...
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    Re: Basic Question on Iris Scale

    OP, aperture scales are lens-specific. You may be able to get away with using the shutter's scale, but this isn't guaranteed.

    Here's the test:

    Open the shutter. Firing it at "T" is best.
    ...
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    Re: Indexing Outstanding Forum Threads

    Um, Neil, if you used "the list" you'd have noticed that it contains links to some interesting discussions here. The f/9 Computar discussion is one of them.

    The list also contains directions for...
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    Re: What kind of lens has aperture scale in mm?

    Ron, there is no easily copied direct link.

    I just clicked on the link in your post, got to https://books.google.com/books?id=cnkWAAAAYAAJ&dq=zeiss+unar&source=gbs_navlinks_s, clicked on the...
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    Re: Lens board too thin

    I've used paper shims between shutter and board.
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    Re: Process lens image circle nature

    There are dialyte type Apo-Nikkors, too.
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    Re: Process lens image circle nature

    If you'd read this discussion from the beginning you'd know that the longest Apo-Gerogon is too short for the OP's project.
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    Re: Process lens image circle nature

    How will you keep the paper plane perpendicular to the lens' axis?
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    Re: Process lens image circle nature

    I think you're asking about illumination, not about image quality. Long process lenses such as you mentioned all cover relatively narrow angles. For example, the 750/9 Apo-Nikkor (tessar type)...
  13. Re: A very nice dissertation on soft focus lenses

    Directions for buying the VM can be found in "the list." Follow the link in the first post of the lens section's sticky "Where to find ..."
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    Re: Shutter size interchangeable?

    Thought so. Short answer, lens cells that fit a #1 shutter will not fit a #0 shutter. No way, no how, even with adapters. And according to Schneider that lens is in a #1.

    I just looked at...
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    Re: Shutter size interchangeable?

    Hmm. Schneider? 180 mm? f/4.5? Sure sounds like a Xenar. Apo-Symmars are all f/5.6. Ain't no Apo-Xenars.

    What is engraved on your lens' trim ring? Name, focal length, maximum aperture? ...
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    Re: What kind of lens has aperture scale in mm?

    Papi, de la liste:

    Zeiss Jena:

    1901 Zeiss London catalog: http://books.google.com/books?id=cnkWAAAAYAAJ&dq=zeiss+unar&source=gbs_navlinks_s CZ London, really. In English. Click on the...
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    Re: What kind of lens has aperture scale in mm?

    Tiene que usar "the list," dodo pequenito.
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    Re: What kind of lens has aperture scale in mm?

    Papi, why guess when you can look up Zeiss' own explanation? In post #2 above I directed the OP to two CZ catalogs. See p. 17 of the 1901 CZ London catalog.
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    Re: What kind of lens has aperture scale in mm?

    At infinity, the f/stop set is the f/stop you get. At closer distances the effective f/# is larger, the effective aperture smaller, than the f/stop set. In most situations the effective f/# is so...
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    Re: What kind of lens has aperture scale in mm?

    Surely you meant effective.
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    Re: What kind of lens has aperture scale in mm?

    Silly semantics alert!

    I'd always that that casket sets were a collection of cells that could be singly or in pairs as desired. Each cell is claimed to be a fully corrected anastigmat. If I...
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    Re: Lens questions from a new 4x5 shooter

    The 4x5 focal length that's roughly equivalent to 50 mm on full frame 35 mm is conventionally said to be 150 mm, which is 4x5's normal (= film gate's diagonal) focal length. However, 35 mm's normal...
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    Re: Lens questions from a new 4x5 shooter

    The 105/4.5 Tominon is one of a set of macro lenses, all designed to be used at magnifications > 1:1, for the Polaroid MP-4 system. There are versions of it in Copal #1 (I think) shutter for...
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    Re: Infinity or Hyper Focal?

    Time to calculate. There are many DoF/hyperfocal distance calculators around. When you use one, make sure that you pick a Circle of Confusion that makes sense for you. Most of the calculators'...
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    Re: Infinity or Hyper Focal?

    Why calculate when you can measure?

    Find a far, far distant subject, mount a lens, focus on it, mark where the standards are or measure the distance between them.

    When you want to set up your...
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    Re: What kind of lens has aperture scale in mm?

    For a time -- some time in the 1890s to early 1900s -- Carl Zeiss Jena scaled apertures in mm. See, e.g., the 1901 CZ London catalog, which has an extensive discussion. There's a link to it in the...
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    Re: Schneider 58mm XL datasheet

    LF helps those who help themselves.
  28. Re: Alternative to the Schneider Xenotar 150mm F2.8 for 4x5?

    Bernice, most of those six inch lenses were made to cover 6x6, not 4x5. The Elcan exception that covers 4x5 is the C-180, which can be recognized by its serial number (180-xxxx). Very uncommon.
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    Re: Schneider 58mm XL datasheet

    Newbie (not pejorative, descriptive), this forum has resources. If you go to the Lens sub-forum, you'll find a sticky "Where to look ..." The first post in that discussion contains a link to a list...
  30. Re: Can you diagnose this patchy look of the lens?

    It is filthy, may or may not clean up.
  31. Re: Alternative to the Schneider Xenotar 150mm F2.8 for 4x5?

    I believe I've directed you to "the list." If I haven't, please ask for directions.

    It contains a link to a piece by Mike Briggs, a PhD physicist, that discusses how severe a radiation hazard the...
  32. Re: Alternative to the Schneider Xenotar 150mm F2.8 for 4x5?

    7"/2.8 AeroEktar. Doesn't go in shutter.
  33. Re: Has there ever been a retrofocus wide that covers 4x5/9x12 or larger?

    That's really neat, also new to me, so I don't mean to disparage it but although 133 mm isn't much wider (59 degrees on 4x5) than Oren's 190 (43 degrees), it isn't particularly wide for 4x5. More of...
  34. Re: Has there ever been a retrofocus wide that covers 4x5/9x12 or larger?

    That's a bit short for a 2x3 Graflex, and flange-focal distance isn't all that matters. Back focus is the real killer.
  35. Re: Has there ever been a retrofocus wide that covers 4x5/9x12 or larger?

    Sorry, no.

    The closest is the 1.75"/2.8 Elcan type C-88 (serial numbers are 88-xxxx), which is the shortest lens that will focus to infinity on a 2x3 Pacemaker Speed Graphic. Covers 6x6, just. ...
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    Re: Share your Eurygon examples

    Which focal lengths are you interested in?

    I had a 35/4 Eurygon that was sold as a macro lens for the Polaroid MP-3 system. No images to share, it badly failed acceptance testing.
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    Re: 8x10 Coverage Fujinon-W 210mm f5.6?

    Braxus, I know you asked for practical advice. I can't give it, don't shoot 8x10 even though I have a late 210/5.6 Fujinon (name engraved on the front cell's barrel, s/n on the rear cell's barrel)....
  38. Re: Paint 'balded' or coating peeling inside the lens ...

    Nacho, the Sironar is fine. If you look closely, you'll see that the Symmar-S has something on an inner surface of the rear cell.

    As Bryan said, the Symmar-S has light Schneideritis. Trivial,...
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    Re: DOF on 8x10 vs. 4x5?

    Short answer, if the image size on 8x10 is the same size relative to the format's size as on 4x5 it will be twice as big. Magnification will 8x10 will be twice magnification on 4x5. Since DoF is...
  40. Re: Graflex Series D 4x5 SLR Loud Shutter and Vibrations

    OP, my humble little 2x3 RB Ser. B's shutter makes a loud bang and shakes the camera at the end of its run. This is normal and since it happens with the shutter closed has no effect of image...
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