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Thread: Center filter question - usage on different formats

  1. #31

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by xkaes View Post
    Anyone ever use a CND filter with a pinhole?
    Yeah ‘cuz the exposure times aren’t already long enough

  2. #32

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by Michael R View Post
    Yeah ‘cuz the exposure times aren’t already long enough
    Not any worse than adding a green or red or orange or PL filter -- or a combination.

  3. #33

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by Greg View Post
    Ended up shooting three times with the filter mounted at three different distances behind the pinhole.
    I never thought of that. I was thinking in FRONT of the pinhole. That's where I put my 77umm contrast filters -- but I suppose it wouldn't make any difference????

  4. #34

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by xkaes View Post
    I never thought of that. I was thinking in FRONT of the pinhole. That's where I put my 77umm contrast filters -- but I suppose it wouldn't make any difference????
    The 11x14 pinhole camera has a sliding brass shutter in front of the pinhole. It was just easier to mount the CND filter behind the pinhole. In front of or behind... it shouldn't make any difference should it?

  5. #35

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by Greg View Post
    The 11x14 pinhole camera has a sliding brass shutter in front of the pinhole. It was just easier to mount the CND filter behind the pinhole. In front of or behind... it shouldn't make any difference should it?
    Focus shift

  6. #36

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by Bob Salomon View Post
    Focus shift
    "Focus shift" with a pinhole camera???

  7. #37
    Drew Wiley
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    Re: Center filter question - usage on different formats

    Once corner hue shifts occur with color films, it implies a degree of crossover of the dye curves themselves, in some cases so inextricably that one simply can't post-correct the color per se in PS just via a contrast tweak, or even a simple color correction applied to the affected area. Think of concrete - once it's mixed and sets up, it's almost impossible to actually separate the sand, cement, and gravel ingredients, even with a Jackhammer. So whenever possible, it's best to do the correction at the time of the shot itself. I get awfully tired of hearing people state they can do "anything" in PS, and then when they can't, they're the very ones cursing Kodak or Fuji for incompetence and selling such a lousy film.

  8. #38
    Alan Klein's Avatar
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    Re: Center filter question - usage on different formats

    Quote Originally Posted by Drew Wiley View Post
    Once corner hue shifts occur with color films, it implies a degree of crossover of the dye curves themselves, in some cases so inextricably that one simply can't post-correct the color per se in PS just via a contrast tweak, or even a simple color correction applied to the affected area. Think of concrete - once it's mixed and sets up, it's almost impossible to actually separate the sand, cement, and gravel ingredients, even with a Jackhammer. So whenever possible, it's best to do the correction at the time of the shot itself. I get awfully tired of hearing people state they can do "anything" in PS, and then when they can't, they're the very ones cursing Kodak or Fuji for incompetence and selling such a lousy film.
    That makes sense for color film. What about BW film?

  9. #39
    Drew Wiley
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    Re: Center filter question - usage on different formats

    Obviously no color crossover issues with black and white film, but the very real risk of losing all tonal gradation off in the nether corner regions. Might not bother anyone at all looking at a contact print or small enlargement of the image; but then, if they scale the same image up to a big enlargement, the emptiness might be quite annoying. All depends. There are no rules applicable to every situation. You decide.

    But I like to take advantage of as much of the straight line of a film way down into the shadows as I can, especially in high contrast situations, because that often alleviates the need of "minus" or "pull" processing or otherwise compensating development which penalizes midtone tonality. That's all potentially usable real estate way down there, which I want present on the negative, and not preempted. More density can always be burned-in or over-developed during the printing step afterwards if desired. But if nothing is there in the neg at all, there's no recourse. You can't opt to print detail or shadow texture that's nonexistent on the neg itself.

  10. #40

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    Re: Center filter question - usage on different formats

    Quote Originally Posted by Greg View Post
    The 11x14 pinhole camera has a sliding brass shutter in front of the pinhole. It was just easier to mount the CND filter behind the pinhole. In front of or behind... it shouldn't make any difference should it?
    I don't use a shutter, so that's not a factor for me, but if the CND filter is on the front, that could cause more glare/flare, I suppose -- but I use lens shades.

    But depending on the subject a CND filter -- assuming it works -- may help or hurt the subject.

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