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  1. Re: Diffraction. When does it really matter with LF?

    Jim's post reminds me of a little trick I learned from ancient markings on a couple of my old shutters: put little paint/pencil marks on the aperture scale at 1 inch and 1 centimeter. It makes the...
  2. Re: Diffraction. When does it really matter with LF?

    For large format, this is key. If you're contact printing, (no enlargement of the negative), forget diffraction. It will barely show up at f/256.



    Nitpicking, but isn't 1:1 and f/16 nominal...
  3. Re: Diy tripod, plans, advice and links to plans please

    At my age, I'm wondering whether a balsa wood tripod would work...
  4. Re: Diy tripod, plans, advice and links to plans please

    The Ries tripods are made from Hard Maple/Rock Maple/Sugar Maple (all the same), though the company has recently been offering other woods on "custom" tripods.
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    Re: Certificate Expired

    It was all a hoax! Fake certificates are the Reptilians' way of controlling our minds! Spots on your negatives are caused by having sex with demons in your dreams! Watch You-Tube for the real...
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    Re: Certificate Expired

    Yup, I got it too.
  7. Re: Bellows Extension Factor & Flash Photography

    Most strobes have variable output. You can also use films of different ISOs, if you aren't committed to one film in particular. ND filters on the lens, or over the strobes, (those on the strobes...
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    Re: Good light lens for 8x10’

    Modern coated Dagors are always nice, reasonably light, and fairly bright.
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    Re: Meniscus lens iris "sweet spot"???

    If I was talking about coma, I would have said coma, as I did when talking about coma earlier. I didn't post a link.



    Yes, and you can also increase spherical aberration by altering the...
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    Re: Meniscus lens iris "sweet spot"???

    As you change the position of the stop, you change where rays coming from off the optical axis though the aperture strike the lens. In a lens with significant spherical aberration (like a meniscus),...
  11. Re: Do I need a contrast or ND Lens Filter for Verito 18” F4?

    I worked with one in a studio many times without. No problem, even wide open. If you're working outside in the daytime, yep, you'll need an ND filter or a shutter, (do a search for "Galli shutter",...
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    Re: Meniscus lens iris "sweet spot"???

    Just a note that aperture position is one of the "design freedoms". There's some choice involved because different positions are the "sweet spot" for minimizing different aberrations. The sweet...
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    Re: 20x24 lenses

    If you're doing still lifes, the Tessar may well cover at close distance.
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    Re: 210mm F5.6 Lens For 8x10

    The 210mm f/6.8 Dagor and Ilex Acuton f/4.8 215mm both cover 8x10, but not much more.
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    Re: Review of new Ansel Adams book!

    Well, at least it worked out better than "Giclιe"...
  16. Re: Part of vintage lens or vintage car or something else?

    I'd guess a front aperture for when using the Petzval's rear element alone as a landscape lens, though it doesn't look original.
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    Re: Radioactive Lens Treatment

    I leave my Aero-Ektars on the windowsill of my studio, with the back elements facing out and the fronts covered with aluminum foil so they don't focus the sun and start a fire.
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    Re: eTone focusing cloths - opinions?

    I find a Dracula cape works well, plus you can scare away little kids who get too curious. (And I always feel more creative when speaking in a bad Transylvanian accent...)
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    Re: The Uncanny Tale of Shimmel Zohar

    Best photographers ever! And even Sir Arthur Conan Doyle, author of the Sherlock Holmes mysteries, pronounced their fairy photographs as authentic, so they must be real!
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    Re: 8x10 Wide Angle Lenses for Still Life

    At these bellows extensions on this format, the center filters aren't necessary. They're only needed when the center of the lens is significantly closer to the center of the image than the corners.
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    Re: Zone VI Alignment Tips!

    For alignment on any enlarger, get a piece of plexiglass or regular glass with a grid on one side and put it in where the negative carrier goes. Check with a grain focuser to see if it's all in...
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    Re: The Uncanny Tale of Shimmel Zohar

    What a cynic. Next you'll be denying the existence of fairies...
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    Re: The Uncanny Tale of Shimmel Zohar

    This reminds me of when I watched the "Game of Thrones" series in its entirety. Know what I found out later? THE WHOLE THING WAS FAKE! It never even happened! Just a bunch of professional actors...
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    Re: 8x10 Wide Angle Lenses for Still Life

    At close distances with extended bellows, coverage expands greatly. A lens that just covers 4x5 at infinity will cover 8x10 at 1:1.

    In my experience, very wide angle lenses perform pretty...
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    Re: Some Soft Focus Lens Sales Information

    Front AND rear elements? Umm...
  26. Re: Should I return this Dallmeyer Pentac 8" f2.9?

    Agreed, return it.
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    Re: Velostigmat Series II; Info and Images

    I still turn to my Velostigmats as much as any other lens, and that 9.5-inch is still a sentimental favorite! And Darryl's quite right about using both the aperture and the spacing to control the...
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    Re: Wet Plate image sharing, August 2020

    Wet plate takes a while to master, more so than film because there's more of a hand-made aspect to it. Some problems can be corrected with specific advice, but a lot of it is improving both...
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    Re: The Uncanny Tale of Shimmel Zohar

    There are worse things to believe in... :)
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    Re: Goerz Dagor 6” f/6.8

    Don't know about Roversi, but Avedon used a Schneider Symmar-S 360mm and a Fujinon 360mm f/6.3 lens. Both would be considered pretty modern. 360mm on 8x10 is equivalent to 180mm on 4x5, so take...
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    Re: Goerz Dagor 6” f/6.8

    The signature of the cyanotype process will overwhelm the look of most vintage lenses, unless you're going with something that has an extreme signature like a swirly Petzval or a soft focus of the...
  32. Re: Troubleshooting, or What the Hell Is That?

    If you're moving the plane of the plate, it may be out of registration with the ground glass.
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    Re: Cut Out Cards aka Viewing Mask

    I used to use an old window mat that was too scuffed up to be presentable, or an empty 4x5 negative carrier. These days I just use my eyes. I think it mostly depends on how your brain sees, and...
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    Re: Focusing at 1:1 magnification

    Hi, Bob! Just curious, is this an indication that the 180mm Apo Macro Sironar is symmetrical, while the 210mm Macro Sironar is not?
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    Re: Focusing at 1:1 magnification

    The only 121mm lens I know of is the Super Angulon. I have one and tried it long ago as a close-up lens (as I wanted something with lots of movements) and found it performed very poorly as a macro. ...
  36. Re: "Collodion" documentary about Eric Overton

    I couldn't make it through the trailer...
  37. Re: Wet plate process not producing an image

    Perhaps a gross overexposure? One second with an f/2 or 2.8 lens in bright sunlight would be too much.
  38. Re: Verito 22 1/4 inch Extension Lens Serial Numbers?

    I have two, and a close inspection revealed no serial numbers or other markings on the rear.
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    Re: Longest Wet Plate Exposure Times

    I don't like to go longer than 5 minutes (indoors) as the plate can start to dry and the image suffers. Knowing Sally Mann's work, I don't think that's as much of an issue for her.
  40. Re: Which of my 5 LF lenses are worth keeping or worth upgrading?

    The lenses that will make the photographs you want to make are the one's worth keeping.

    I always figure if I sell a lens I'm not interested in using, the lens needed to upgrade to a better owner....
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