70mm film backs

Discussion in 'Medium Format Cameras and Accessories' started by rogueish, May 9, 2005.

  1. rogueish

    rogueish Member

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    How much film would one of these backs hold? Would they be comparable to 120 film backs in length of spool capacity, or can they hold a longer length? Anybody using these on any brand/model/format camera?

    I'm using a Mamiya RB67, but would like to here from anyone using or has used this size.
     
  2. Dan Fromm

    Dan Fromm Member

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    The Graflex RH-50 holder should fit your camera, takes 50 6x7 shots/load.
     
  3. Nick Zentena

    Nick Zentena Member

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    The standard size cassete is 15feet. Some of the over grown ones aimed I guess at the school portrait market handled a full 100 feet. To compare 220 is about 5 feet.

    The Graflex Dan mentioned is nice because it'll use any kind of film you can load into a cassete. OTOH I think the Mamiya back only handles perforated film. I get the impression perforated will go away before unperforated.

    Consider how you intend to process the film.
     
  4. David A. Goldfarb

    David A. Goldfarb Moderator Staff Member Moderator

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    Also, check to see what's left--mostly color neg portrait films and aerial B&W and maybe some kind of transparency duping film.
     
  5. Terence

    Terence Member

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    Trying this myself. David Romano's website is showing that he's expecting an order of b&w Kodak IR film (Type 2424), but is asking $750 per 150' roll. Seems high. Does anyone remember what it previousl went for? B&H no longer shows it on their site. FWIW, Kodak has pretty high minimum orders on the 70mm film these days. Between 4 and 18 rolls depending on film type.

    While we're on the 70mm topic, how do you attach the film to the spool in the 15' cartridges? I found one website mention a metal clip, but none of the ones I have (all Kodak, from two different sources) have a metal clip, just a smooth plastic spool. Will tape work okay? If so, what type is best?
     
  6. Nick Zentena

    Nick Zentena Member

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    J&C is bringing in EFKE B&W film. Non perforated I think.

    All my cans have clips but I can't think why tape wouldn't work. Obviously it's a bigger piece of film so you'll want a better grip on the film then with a 35mm spool.


    http://www.a1.nl/phomepag/markerink/ir_sizes.htm

    According to that in 2000 150 feet was $280.
     
  7. Terence

    Terence Member

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    Thanks Nick. What does the clip look like? Does it stay on the spool or does it come off? Is it the full width of the spool? I'm just trying to picture it so I can maybe make one or two.
     
  8. david b

    david b Member

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    I have a hasselblad 70mm back for sale for $85 including shipping. Also includes one cassette.
     
  9. Nick Zentena

    Nick Zentena Member

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    The clip is small. Without measuring I'd say less then 1/2". It comes off. Not a full circle. Just a ring with I guess a 45degree section cut out of it. Best way to describe it.
     
  10. rogueish

    rogueish Member

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    That's another detail I am considering. I'll be sticking with the 120 backs for now.
    With cut down HIE at $16(USD) a roll +shipping+ international handling, or Maco's at $13(CDN) in stock, looks like I won't be doing any Kodak HIE in the near future.
     
  11. europanorama

    europanorama Member

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    i use paper-tape.
     
  12. Terence

    Terence Member

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    Thanks. There was post over on the medium format portion of photo.net saying that Maco is releasing a perforated 400 speed 70mm IR in October. Things may be looking up. I haven't tried any Maco except the Ortho, so this might be a reason to expand my horizons.
     
  13. Phillip P. Dimor

    Phillip P. Dimor Member

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    As far as developing 70mm C41, I believe that you can run it through many noritsu film processors. I'm not sure about running 100ft. of film through all those rollers though.. My boss said he would let me run 6ft or so through. No customers have brought us any 70mm film to process.. As long as the film cartridge fits inside the film holder bay with the lid closed it should work.

    Any other ideas for processing 70mm black and white?