Is 5x7 film same size as 13x18 cm film ?

Discussion in 'Large Format Cameras and Accessories' started by GeorgesGiralt, Oct 29, 2007.

  1. GeorgesGiralt

    GeorgesGiralt Member

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    Hi !
    One see film holders in 5x7 film size and in 13x18 cm film size. sometimes, they are advertised as 5x7/13x18...
    So is it possible to use 5x7 film in a 13x18 film holder and the other way round ?
    If I convert the inches with 2.54 cm for an inch the difference is not so great, after all !
     
  2. Ian Grant

    Ian Grant Subscriber

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    No they aren't the same, but modern film holders have the same outside dimensions so a 5x7 International back will accept a 13x18 film holder and vice versa. Same goes for 5x4 and 9x12.

    The film sizes are still different, and older film holders differ too.

    Ian
     
  3. Bandicoot

    Bandicoot Member

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    As Ian has said, 13x18 (cm) and 5x7 (inch) holders can both be used in a ' 5x7 ' back, although the film sizes differ. So too can half-plate film holders, which have the same outside dimensions and take the 4 3/4 x 6 1/2" (12x16.5cm) sheets. I have half a dozen boxes of half-plate Velvia in the film 'fridge - it's a nice size.


    Peter
     
  4. Ole

    Ole Moderator Staff Member Moderator

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    Just a little more details...

    A 13x18cm film has a nominal size of 12.7x17.8cm, which by sheer coincindence happens to be 5 by 7 inches. But since all modern film sizes are derived from plate sizes minus a few mm for film adapter sheaths, the 5x7" film is smaller than the nominal size of a 13x18cm film.

    The result of this is that a 13x18 film will buckle in a 5x7" holder, and a 5x7" film will drop out of a 13x18 holder. I have has both of these things happen to me. But I have also come across films at the extremes of the production tolerance, so that I could use 5x7" films in 13x18 holders and vice versa! However one should not rely on this, as it happens very rarely (and most often with producers with somewhat sloppy quality control).
     
  5. No Digital

    No Digital Member

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    Well... my experience is a little different...
    5x7 inches is 10,2x12,7 centimeters, 13x18 centimeters is 13x18 centimeters...
    I have 13x18 holders an 13x18 film, the film does fit in without problem; 5x7 film enters too but it moves inside.
    I have 5x7 film hangers and 13x18 film and the film DOES NOT fit in! there are 3 millimeters of difference, but sufficient not to let the film to go inside a 5x7 hanger...
     
  6. Bob F.

    Bob F. Member

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    I don't know where you are buying your inches from but I'm afraid you are being short-changed :wink: - 102mm x 127mm is 4"x5", not 5"x7".

    Bob.
     
  7. No Digital

    No Digital Member

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    ...ops! Sorry!!! 5"x7" is 127mm x 178mm... A little confusion :wink:
     
  8. GeorgesGiralt

    GeorgesGiralt Member

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    Hi !
    Yesterday I've got the two holders.
    They are old Fidelity (look like new plastic one but they have dark slide like the old one, made for plates).
    On the top plastic part is molded Fidelity 5x7 film holder and on one recess at the middle of the top of the holder there is a painting that says 13x18 cm ...
    So I still wonder if I can feed them with both sizes or not ;-) For now, I only got 8 sheets of FP4+ in 13x18 given to me by a fellow photographer, but who knows, I may get some 5x7 one day !
     
  9. Ole

    Ole Moderator Staff Member Moderator

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    The "easy" way to tell the difference is that if 13x18cm is painted on, they're 13x18. ALL the Fidelity holders in those sizes are marked 5x7", and then 13x18 or 4 1/2 x 6 1/2" is painted on for those made different.

    Yes, it's confusing. Yes, some sellers don't know the difference...
     
  10. otaku

    otaku Member

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    I just started shooting Efke direct postive paper in my 5x7, and the paper has to be trimmed to fit the 5x7 holders. (Ortho film also has to be trimmed) Anyone know offhand if 5x7 paper would fit in 13x18 holders? And whether the 13x18 holders would fit in a 90-year-old Seneca View that currently has wooden holders?
     
  11. Nick Zentena

    Nick Zentena Member

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    Does the Seneca take modern 5x7 holders or plate holders? If it takes modern film holders you're fine.
     
  12. Ole

    Ole Moderator Staff Member Moderator

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    5x7" paper is "full size", i.e. just as large as the original 5x7" plates. And yes, 5x7" paper will fit in a 13x18cm holder.
     
  13. ragc

    ragc Member

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    I agree with Ole's original observation from experience. 5x7 film ends up inside your bellows (and outside the 13x18 holder) once you re-insert the darkslide!