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  1. Re: Elmar 135mm: Will it cover 4x5? LSM to Copal adapter?

    For one thing, it wasn't specifically designed for 4x5. Exploration is its own reward.
  2. Re: Elmar 135mm: Will it cover 4x5? LSM to Copal adapter?

    If you don't have the money, a step-up ring should work. Both the Elmar and the Copal have pretty common thread sizes.

    Even if it doesn't cover, it may be fun to work "in the round" once in a...
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    Re: Soft Focus Lenses and Filters Usage

    It's not just what we look like in a photograph vs. in real life. It's how we look at people in real life vs. how we look at people in photographs.

    When I'm talking to someone, I look at them,...
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    Re: Soft Focus Lenses and Filters Usage

    For the emergence of softer imagery as an aesthetic in the photographic arts, read Peter Henry Emerson's 1889 Naturalistic Photography for Students of the Art.

    Commercially, soft focus became a...
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    Re: Still Life, 2021

    Lovely! Window light?
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    Re: Something I couldn't explain

    The larger lens loses its exposure advantage when stopped down. F/8 through a Petzval = f/8 through a Rapid Rectilinear. Same exposure times for any given situation.
  7. Re: Is a macro lens as versatile as a digital macro

    First, be aware that a 240mm macro will take 480mm of bellows to focus at 1:1. People tend to use shorter lenses, say, 90-150mm for 4x5.

    If you're working at 1:1, process lenses and enlarger...
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    Re: Portraits from 2021

    My compliments as well! A lovely portrait, hope to see more...
  9. Re: Tripod Head For 8x10? Arca Cube, Ries J250, Luland LD115, Acratech GXP

    The big question is "how much off-level do you use the camera?"

    Unless you use it at more than 20-30 degrees, you can just skip the head altogether. Use the adjustable leg lengths and angles...
  10. Re: Wollensak 9.5" f4.5 Velostigmat Series II Lens

    It would be a lovely lens for portraiture if it fits on the lensboard. You might be a little restricted on close-ups because of bellows extension, but you could always make an extended lensboard for...
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    Re: B&J Rembrandt 5X7 & 8X10

    The medium-dark wood stain was the standard factory finish on the many Rembrandt 5x7s I've seen, and it looks good on them, so I'd go with that. The battleship-grey was a semi-popular fad after...
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    Re: Forum Growth.....or not?

    I think we should ban Donald Trump from this forum. Just because everyone else is doing it...
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    Re: getting glass CLEAN, how do you do it?

    Seems like a waste of a good India Pale Ale...
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    Re: Tintype fogging while drying

    I second this.
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    Re: getting glass CLEAN, how do you do it?

    I've found the main culprit in getting glass spotlessly clean isn't the cleaner used, it's the cleaning cloth.
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    Re: Secure selling?

    Paypal is the norm, but really, it's up to the buyer and seller to work it out however they are comfortable.
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    Re: Fast High Quality DIY GG

    Helpful hint: Use a second piece of glass to do the grinding, and you get two pieces of ground glass for the same time and effort.
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    Re: Which are the fancy lenses??

    Yes it is. You shoot some hokey bokey and you turn yourself around.

    That's what it's all about.
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    Re: f/5.6 or slower 300mm for 8x10?

    The B&J is a fairly heavy camera, at the far end of what most people would consider a "field camera". Trying to save weight on the lens is wandering into the area of diminishing returns, like...
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    Re: Which are the fancy lenses??

    For some of the more knowledgeable users, the shutter is as important as the lens...
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    Re: Fixing bellows corners

    That's the usual method for bellows with very worn corners. Pretty obvious advice, but:

    Stretch out the bellows as much as you dare before taping.

    Use a flexible fabric paint (available at...
  22. Re: What is this shutter on a Vesta Portrait lens?

    I'm always right, and I never lie! :rolleyes::rolleyes::rolleyes:
  23. Re: What is this shutter on a Vesta Portrait lens?

    Best to assemble the lens in its new shutter and determine the f/stops by measuring. The new Alphax may not close down at the same linear rate as the old shutter.
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    Re: Putting together lenses from scratch

    Primitive Photography: A Guide to Making Cameras, Lenses, and Calotypes, by Alan Greene, has a 58-page chapter that does a decent job with the basics.
  25. Re: Tilt an old lens a teeny bit off axis to improve image. Anyone ever heard of this

    Well, "Tessars types, Commercial Ektars, Dagors, some Artars" are all pretty flat field, so it's not field curvature. Maybe the camera was out-of-kilter, and needed a degree or two of front tilt to...
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    Re: What's your Go To LF body & lens?

    The more I eat and the older I get, the larger the format of my body seems to be.

    Not yet sure about the lens, though...
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    Re: Putting together lenses from scratch

    The first thing you need to do is build an optical bench to test the various configurations. Otherwise, you won't know whether what you're building works until after it's built. Just a few mounts...
  28. Re: Tilt an old lens a teeny bit off axis to improve image. Anyone ever heard of this

    Unless you're using Petzvals or meniscus lenses, I doubt it was field curvature. Regardless, front tilt won't remove field curvature. No movement will. Could be focus shift from stopping down, but...
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    Re: Social Media 101

    But think how much better large format photography looks on a cell phone!
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    Re: What focal length, taking aperture used?

    That was my next guess.
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    Re: What focal length, taking aperture used?

    Not much to go on...

    90mm, f/22?
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    Re: 4x5 Portrait lens & Chamonix F2

    A second for Hugo's suggestion of a Dagor; nice for portraits wide open and sharp with lots of movements closed down. And you can probably find a newer one in a decent shutter.

    If it weren't for...
  33. Re: Diffraction. When does it really matter with LF?

    That makes sense! Thanks!

    But is chromatic aberration a geometric effect? :confused:
  34. Re: Diffraction. When does it really matter with LF?

    That makes sense. But the diffraction limits calculators I've seen go by f/stops, not actual aperture size. And of course, f/stop dimensions change with focal length, as that's the "f" in "f/stop".
  35. Re: Diffraction. When does it really matter with LF?

    In our case, that would be an opening in the photon-wave-amplitude size, something well below f/64 for our lenses.

    One thing I don't understand about diffraction is why it is affected by focal...
  36. Re: Diffraction. When does it really matter with LF?

    Agreed, Drew, but which other aberrations are ever corrected to perfection, not just reduced or avoided?
  37. Re: Diffraction. When does it really matter with LF?

    Diffraction can be corrected by opening up the aperture. Just like you can correct spherical aberration or curved field by closing down the aperture.

    But one can also correct spherical aberration...
  38. Re: Diffraction. When does it really matter with LF?

    Why isn't diffraction considered an optical aberration? It's missing from the conventional list of aberrations.

    Late night pondering... :confused:
  39. 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...
  40. 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...
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