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Thread: ANSI Film Holder Details

  1. #41
    animaux's Avatar
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    Re: ANSI Film Holder Details

    Thanks for your input guys! Will look into it and try to correct the errors later on.

  2. #42
    animaux's Avatar
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    Re: ANSI Film Holder Details

    Quote Originally Posted by Randy Moe View Post
    Ya, I looked you up, you do a lot of paper negs.

    I just miked processed MG RC at 0.010" I make you convert. All my tools are SAE.
    I did a few paper negatives, I wish I had the time to do a lot of them :)

    I just checked the thickness of Ilford MG IV paper. It’s 0.009" = 0,23mm

  3. #43
    animaux's Avatar
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    Re: ANSI Film Holder Details

    Quote Originally Posted by Jim Jones View Post
    This is a great service to the large format community. I could never have done as well. A more compact format may be more convenient to the user.

    A min for 5x7 through 14x17 are transposed. A min for 5x7 should be 213.92: for 8x10, 295.28; for 11x14, 411.18: for 14x17, 496.90

    G min for 8x10 should be 275.34. not 275.53

    You have transcribed the T distance for 11x14 and 14x17 exactly as it is in ANSI/PIMA IT3.108-1998 including the inconsistency in the original.
    Thanks, I’m happy if this helps people building interesting things! It was fun to do this too.

    Also, thanks for pointing out the errors. I think I fixed the translocated and incorrect values. Will do a doublecheck later on.

    As for the T-inconsistencies for 1114 and 1417 — what should be the right values? In the ANSI there is also a table with imperial conversions. Those are identical.

    There are some other areas that look suspicious. For example: Why are only negative tolerances allowed for some of the M1/2 values? Should M2 really be 1.57 on 45 holders?

  4. #44
    animaux's Avatar
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    Re: ANSI Film Holder Details

    Quote Originally Posted by animaux View Post
    Should M2 really be 1.57 on 45 holders?
    On my Fidelity and Lisco-Holders M2=1.57mm seems to be correct.

  5. #45

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    Re: ANSI Film Holder Details

    Quote Originally Posted by B.S.Kumar View Post
    That's the clearest example of film holder dimensions I've seen. Thanks!

    Kumar
    +1

  6. #46
    Tin Can's Avatar
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    Re: ANSI Film Holder Details

    Quote Originally Posted by animaux View Post
    Thanks, Im happy if this helps people building interesting things! It was fun to do this too.

    Also, thanks for pointing out the errors. I think I fixed the translocated and incorrect values. Will do a doublecheck later on.

    As for the T-inconsistencies for 1114 and 1417 what should be the right values? In the ANSI there is also a table with imperial conversions. Those are identical.

    There are some other areas that look suspicious. For example: Why are only negative tolerances allowed for some of the M1/2 values? Should M2 really be 1.57 on 45 holders?
    You need to look at current ULF film holder builders who may not be forthcoming.

    Some sites have Data.

    They can come forward or not.

    After all, they are trying to run a business in a shrinking market.

  7. #47
    animaux's Avatar
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    Re: ANSI Film Holder Details

    Quote Originally Posted by Randy Moe View Post
    You need to look at current ULF film holder builders who may not be forthcoming.

    Some sites have Data.

    They can come forward or not.

    After all, they are trying to run a business in a shrinking market.
    There is some discussion about 1417 holders in this thread, with some actual holder builders taking part.

    Considering the allowed tolerances for T with 1417 holder add up to slightly more than 4/5ths of a mm, the values mentioned seem to be well within these.

    Not sure about ULF, but with 810 holders Intrepid is not able to keep up with the demand. I’ve ordered one about 4 months ago, still waiting for it. I think most people who try to build their own holders are mostly not the same ones buying professional holders.

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