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  1. Thread: Industar-37

    by maltfalc
    Replies
    31
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    8,779

    Re: Industar-37

    A 2" top hat lens board will get you close enough for head and shoulders portraits.
    216787
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    488

    Re: 2 sheets of film in the same holder?

    That's what I'd recommend too. Black and white film in front with the anti-halation layer stripped and inserted backwards so the two emulsions are in direct contact at the correct depth with a higher...
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    Re: Reversal vs negative

    after inverting the tone curve, export as a tiff and that'll give you a copy with a normal looking tone curve and sliders that work the way they should.
  4. Re: Use of X-ray film: technical discussion with example images

    hard to say which specific film they're repackaging, but it's double sided orthochromatic, so fuji hr-u green would be similar but at a more useful 50-100 iso. i've bought from these guys before....
  5. Re: Use of X-ray film: technical discussion with example images

    yeah, they've been massively gouging people with that junk for a while now.
  6. Re: 4x5 lens recommendation for fast shutter speeds

    a speed graphic and a fast projector lens.
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    Re: Not DIY Curtains for a darkroom

    you could try a black roller blind, ideally with some extra framing around the door to create a groove that wraps around the edge of the roller blind.
  8. Re: The things I don't know... :) Help (Crazy lens movements; lens choices; bellows o

    no, 7x is the crop factor/multiplier between 35 mm and 8x10. applies to focal length and f-stop. i assume you're talking about a teleconverter or something.
  9. Re: The things I don't know... :) Help (Crazy lens movements; lens choices; bellows o

    7x
  10. Re: How much dimmer on the ground glass is an f/9 lens vs a f/5.6? Or f/5.6 vs f/4.5?

    1:1 will turn your f/9 into an f/18. if you've got a camera handy try using the viewfinder at f/18.
  11. Re: Spectral sensitivity of collodion and orthochromatic film

    ortho usually peaks at around 450nm and 550nm, with sensitivity usually bottoming out before 600nm.
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    541

    Re: nice new lens, but sticky shutter

    soak a bit of kleenex in kerosene and place it in a sealed container with the shutter. the old lube will absorb the fumes and should soften up a bit.
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    621

    Re: Film in freezer

    the two big problems are warm moist air cooling and causing condensation when in contact with cold film fresh out of the freezer or when trapped in the film's packaging and placed back in the...
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    5,384

    Re: Methods for cutting 8x10 film down to 5x7

    my cutter has a raised edge at both the front and back, meaning i can have one permanent stop at the front and one at the back and just place the film against the front or back edge for the two cuts....
  15. Re: Crown Graphic age (camera vs focusing panel)

    i wouldn't expect to see that much wear on the gg from loading film holders and barely a mark on the leatherette along the rear edge that would have gotten just as much abuse if the gg were original....
  16. Re: Are Daguerreotype Included in Wet Plate Threads

    easiest way is to have a dim white light at the opposite end of your darkroom and hold the plate so you can see the white light and it's reflection next to each other.
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    Re: New to LF - First shot - Focusing

    or if he wants something more durable,...
  18. Re: STILL LIFE - Lens Thoughts & Recommendations

    if f/9 turns out to be darker than you want to deal with (it'll be f/18 at 1:1), the old chrome schneider enlarger lenses are really nice, if you can use barrel lenses or find a shutter to adapt the...
  19. Re: What is the Most Difficult Large Format Photography

    volvox thrive around here. a bit of methyl cellulose will slow everything down if i have any issues.
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    Re: Wet Plate portrait lens

    you could try taping an electric toothbrush or something to your camera to add just enough vibration to blur out fine wrinkles.
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    1,299

    Re: Newcomers to LF: First Read The Book

    https://archive.org/search.php?query=view%20camera&and[]=mediatype%3A%22texts%22
  22. Re: What is the Most Difficult Large Format Photography

    well, i know underwater large format photography of moving subjects has been done with a graflex slr and if i remember right they used a massive amount of flash powder rigged up on a floating...
  23. Re: What is the Most Difficult Large Format Photography

    two of my student scopes are this type.
    215453
    the top screws off so i can just use direct projection straight up through my speed graphic with no obstructions. with the other monocular scopes i...
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    Re: How do I remove mold on LF lens

    yeah, that's not mold. if it's not affecting image quality, leave it alone.
  25. Re: What is the Most Difficult Large Format Photography

    i've got a speed graphic, a few basic student microscopes, a stereo zoom kyowa and an old as dirt ao spencer brewmaster with motorized focus and an lcd-based all-in-one darkfield, oblique, etc....
  26. Re: What is the Most Difficult Large Format Photography

    i said MICRO in all caps to make it perfectly clear that i meant micro, with a microscope, not macro.
  27. Re: A foolish idea? Creating a positive transparency from a negative

    a single low wattage bulb that evenly illuminates your work surface high above the negatives would be better. one of these will help you figure out exposure times if you don't want to do a bunch of...
  28. Re: What is the Most Difficult Large Format Photography

    i'm planning to do some LF MICRO photography with living subjects at some point. wish me luck.
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    Re: DARKROOM - Electric Questions

    move the safelight and fan switches away from the other switches, you don't want to mix those up.
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    Re: orthochromatic film?

    215410
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    Re: orthochromatic film?

    i know exactly how dichroic filters work. i've clearly explained how in great detail in this thread. you said you can't buy them from b&h, you can, you're wrong, get over it. i don't know why you...
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    2,202

    Re: orthochromatic film?

    the actual change in brightness of say green to yellow leaves would still have a gradual taper to it because the colour of the leaves includes a wide range of frequencies. not as gradual as with...
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    2,202

    Re: orthochromatic film?

    i'm seeing lots of talking yourself up and going off on condescending tangents without refuting anything i actually said. "No, you don't get them at places like B&H"...
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    Re: orthochromatic film?

    well yeah. i was just answering his question specifically about filtering pan film. blue sensitive x-ray film would also be a dirt cheap and easy option that can be developed under most safelights.
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    Re: orthochromatic film?

    dichroic filters are essentially mirrors that are transparent to some colours but reflect others with nearly 100% efficiency, which is why they're used in colour enlargers, dlp projection tvs, rgb...
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    Re: orthochromatic film?

    if you want "a Watkins/O'Sullivan look" then you don't want an ortho look, you want the look of plates that were mostly sensitive to blue and violet. with pan film a blue dichroic short pass filter...
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    Re: Need More LIGHT: Should I start PUSHING?

    jesus christ, you're just repeating and agreeing with things i literally just explained multiple times in my other comments as if i didn't understand them and insisting i'm wrong somehow, without...
  38. Replies
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    1,564

    Re: Need More LIGHT: Should I start PUSHING?

    in practical terms, if you want to frame your subject (of any size) a certain way in the final image, the larger your film format is, the higher the magnification needs to be and the more light you...
  39. Replies
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    1,564

    Re: Need More LIGHT: Should I start PUSHING?

    *sigh* ok, time for a math lesson. let's say you have a subject the same size as the image area of 4x5 film. to photograph it with a 4x5 camera requires a 1:1 magnification ratio. a 1:1 magnification...
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    Re: orthochromatic film?

    a cyan dichroic filter would give the best result. https://www.bhphotovideo.com/c/search?Ntt=permacolor%20cyan&N=0&InitialSearch=yes&sts=ma
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