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Thread: Actual size of 5x12 film?

  1. #1
    Scott --'s Avatar
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    Actual size of 5x12 film?

    Hi, all -

    Fixin' to start in on 5x12 holders, and it'd be nice to know actual film size. Anyone have a negative they can measure for me?

    Thanks,
    Scott

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    Re: Actual size of 5x12 film?

    FP4+ is about 4 29/32 x 11 29/32 or 125mm x 305mm. But I made my holders to fit 4 15/16 x 11 15/16, which makes it easier loading the holders. Too tight and you'll never get the film in.

  3. #3
    Scott --'s Avatar
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    Re: Actual size of 5x12 film?

    Thanks, Colin. Is the 11-15/16" the length of the exposed septum then? Essentially the length from the flipped up light trap to the opposite rail?

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    Re: Actual size of 5x12 film?

    Scott, the area of exposed septum (which would mean the negative too, right?) is about 1/4 less in each dimension, or 1/8 per side (just to give a rebate) or around 4 21/32 x 11 21/32 with the light trap closed. Hope this is what you needed.

    BTW, did you decide on cherry for the holders?

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    Scott --'s Avatar
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    Re: Actual size of 5x12 film?

    Hey, Colin -

    I've started building the holders. The exposed length of my septum, light trap closed, is 11-15/16". You think that'll pose a problem? Think I should shorten the holders by ~3/16" while I still can?

    Scott

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    Re: Actual size of 5x12 film?

    There is no standard film size for 5X12 or any of the non Ansi films. Consequently most holders are built to the nomal size, i.e. the holder opening for the film should be a full 5X12, or 7X17, or 12X20, or whatever.

    Companies that cut film are generally aware of this and cut the film 1/32" or 1/16" less than the nominal size on both dimensions.

    Sandy King

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    Scott --'s Avatar
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    Re: Actual size of 5x12 film?

    Thanks, Sandy. Sounds like I'm good to go, then.

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    Scott --'s Avatar
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    Re: Actual size of 5x12 film?

    Well, there ya go. Now I need to get some film and see if it's sized right...

  9. #9
    In the desert...
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    Re: Actual size of 5x12 film?

    That holder looks pretty nice Scott, I wouldn't leave it out on the patio if I were you!

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    Re: Actual size of 5x12 film?

    What a great idea, splicing some 5x7 holders together. Nice job!

    So your 'window' in the holder is 11 15/16? That's only 1/32 shorter than the film size....if there's much of a recess under the light baffle end of the holder, the film may slide in too much, or slip back and forth between the the loading flap end and light baffle end so that one end isn't captured. Does that make sense? Probably not an issue for film flatness because it's so skinny but it might get aggravating when composing, you'll inadvertently crop one end or another.

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