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  1. 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...
  6. 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.
  8. 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...
  10. Re: Can you diagnose this patchy look of the lens?

    It is filthy, may or may not clean up.
  11. 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...
  12. Re: Alternative to the Schneider Xenotar 150mm F2.8 for 4x5?

    7"/2.8 AeroEktar. Doesn't go in shutter.
  13. 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...
  14. 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.
  15. 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)....
  18. 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...
  20. 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...
  21. Re: Very rich historical lens diagram resource and additional materials

    OP, I'm glad that you're sharing what you found. dioptrique.info is a fairly well-known site and has been mentioned here many times but mentioning it again can't hurt.

    You and RGB may not be...
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    Re: Schneider-Kreuznach misprint

    Penniless is more like it.
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    Re: Lens Not Focusing, What is the Cause?

    Not quite right. There are two solutions, not one, unless magnification is 1:1. Otherwise there are two magnifications for every film-to-subject distance.

    If film-to-subject distance is 1000mm...
  24. Re: Two Schneider-Kreuznach MAKRO SYMMAR HM 120mm lenses with different back elements

    Check the focal lengths. The lower lens is much larger than the upper one. Don't screw around with mixing and matching cells, those lenses are best used as they were delivered.
  25. Re: How different are Tessars from different companies?

    Not at all. The prescriptions are different.
  26. Re: How different are Tessars from different companies?

    :confused: f/6.3ers have more coverage than f/4.5ers but I'm not aware that Commercial Ektars have more coverage than f/6.3ers.
  27. Re: How different are Tessars from different companies?

    Sorry, can't help you. Look for a copy of A Lens Collector's Vade Mecum, which gives some chronology, or, better yet, Hartmut Thiele's Fabrikationsbuchs.

    I believe that the various vintages all...
  28. Re: How different are Tessars from different companies?

    Interesting assertions about sharpness, whatever that means, no MTF or resolution measurements to support them.
  29. Re: How different are Tessars from different companies?

    Hmm. Tessars from the same company aren't always the same.

    In the beginning, Carl Zeiss Jena made f/4.5 and f/6.3 Tessars. The 6.3ers had usefully more coverage than the 4.5ers. Over time the...
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    Re: Doppel Anastigmat Symmar f:6.8

    The VM says the dagor type Symmar was discontinued in 1954, contradicts itself and says some focal lengths were available into the 1960s, possibly as new old stock. That's the VM.

    Rare? I dunno....
  31. Re: "The big two" - Please tell me about your japanese lenses!

    Hmm. I have, sometimes even use, Fujinon, Nikon, Schneider and Rodenstock lenses. I have, also sometimes use, lenses from manufacturers in other countries, including France, the UK and the US. All...
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    Re: Kit recommendations for a complete beginner

    Bertie, I shoot Graphics (2x3, not 4x5) and a Cambo SC (also 2x3, a smaller version of the 4x5s). I like my little Graphics but they're limited; their only generally usable movement is front rise. ...
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    Re: 31.15mm Threads?

    Short answer, Ilex and Wollensak shutters don't interchange.

    OP, this site has resources you may not be aware of. One of them is a collection of links to sites on LF gear etc. Go to the Lenses...
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    Re: 8x10 Macro Photography lens Question

    Yeah, so what?

    This discussion is not about the wonders of 8x10, it is about which lens might meet the OP's needs well enough.
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    Re: 8x10 Macro Photography lens Question

    Yeah, so what?

    The point of fuegocitos' test shots is that all of his lenses separated fine details equally well. And they did.
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    Re: 8x10 Macro Photography lens Question

    Thanks for the reply. At 1:1, f/16 set is f/32 effective. I don't know how much you enlarged your crops, but at that effective aperture the diffraction limit is around 50 lp/mm, maximum enlargement...
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    Re: 8x10 Macro Photography lens Question

    fuegocito, what magnification did you shoot at?

    Mark, as peppers go #30 is soft everywhere. Just goes to prove that sharpness isn't everything.
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    Re: 8x10 Macro Photography lens Question

    About that 50 El Nikkor, did you use it at 4:1 on 8x10? I ask because following Emmanuel's logic (see https://www.largeformatphotography.info/forum/showthread.php?67361-Calculating-lens-coverage),...
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    Re: 8x10 Macro Photography lens Question

    Papi, you didn't understand. A shorter lens will have less, not more, coverage given magnification. Reversing it won't change that.

    When working close up, we use short lenses when we want high...
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    Re: 8x10 Macro Photography lens Question

    Papi, you have it backwards.
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