Transperency Duplication

Discussion in '35mm Cameras and Accessories' started by modafoto, Feb 14, 2005.

  1. modafoto

    modafoto Subscriber

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    Hi fellow Apuggers

    I need to copy some transperencies and therefore need advice on how to do it. Which method and what equipment to use? Which film?

    I have the following camera systems to use (with a duplicating add-on):

    Canon EOS (EF-lenses)
    Olympus OM
    42 mm Screwmount


    Morten
     
  2. Joe Symchyshyn

    Joe Symchyshyn Member

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    If you've never done this before, you may find it more cost effective to just have a professional lab do the work for you. Depending on the number of dupes you have to make, it may be cheaper and you will likely have perfect dupes as well. The responsibility rests with them to provide you colour matched duplicates.

    joe
     
  3. Flotsam

    Flotsam Member

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    In my day, it was Kodak's 5071. It had a lower contrast (and d-max) and you had to spend some time color-balancing it so it was a good idea to buy plenty from the same emulsion batch at a time. This seems to have been replaced by a film called Edupe. Never used it.
     
  4. modafoto

    modafoto Subscriber

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    Having labs do it in Denmark costs $5 per dub, and I plan to do very many dups, including experiments. So I need some kind of duplicator.
     
  5. Tom Hoskinson

    Tom Hoskinson Member

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    I have duplicated a lot of 35mm transparencies in the past on Kodak 5071. I used a Contax SLR with a bellows and slide copy attachment, plus the Zeiss 60mm Makro Planar lens. My light source was a enlarger color head. I bought 100 foot rolls of film and bulk loaded (each lot of 5071 needed to be tested in my setup).

    Currently, I just scan the slides (and/or negatives) to a CD. Then I send the CD to a lab for printing to slide film.
     
  6. Flotsam

    Flotsam Member

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    Tom, What resolution do you scan at?
    How are the projected results?
     
  7. jd callow

    jd callow Moderator Staff Member Moderator

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    I don't know what Tom does but I have produced a ton of these things on a Solitaire 16 the res across the long edge should be 4092 for 4k or 8184 for 8k. If you size the slide to 11 x 7.33" then the corresponding res's would be 372 and 744 dpi. Cost for output should be about 5.00 for the first slide and less (much less) for copies.

    When projected 4k looks 'grainy' and 8k looks pretty good.
     
  8. modafoto

    modafoto Subscriber

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  9. Joe Symchyshyn

    Joe Symchyshyn Member

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    Should work fine I suppose, why not?

    The duplicator I had experience was essentially an upsidedown colour enlarger with a holder over the lightsource. A camera was mounted to the column and shot down at/through the slide. Obviously colour balance was controlled, but could also be altered to "correct" off colour work.

    Dupe film, is available in daylight and tungsten. My experience is only with the tungsten film from Agfa. We bought it in bulk rolls and spooled up what we needed to do the job.

    If you have a perfect light source that you can keep even, that lens duper should do the trick. A roll for tests and you're in business...

    joe :smile:
     
  10. modafoto

    modafoto Subscriber

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    Thanks. I have flash heads that are very even, so i try it out.
     
  11. Dimitri

    Dimitri Member

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    I have a similar zoom slide duplicator. I used it with a Pentax and a Nikon. It is quite handy if you want to crop part of the slide but I remember flatness used to be a bit of a bother.

    I also pre-flashed the film to lower the contrast.

    Unfortunately last time I duped a slide was more than 4-5 years ago so I can't remember too many details on the preflashing. (Have to dig up my notes - if I can remember where I stored them :D)
     
  12. Tom Hoskinson

    Tom Hoskinson Member

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    I'm using a Nikon Super Coolscan 8000 ED and scanning at 4000dpi. At that level of resolution, the image files are quite large and the resolution in the projected dupes is good.
     
  13. Tom Hoskinson

    Tom Hoskinson Member

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    Those devices work fairly well, but to me, the built-in optics leave something to be desired. A better way to go IMO is with a bellows, a macro lens (or enlarging lens), a slide holder and an upside down color head as the light source.

    You can use ordinary color slide film for slide dupes, but you will need to make color filtration tests for each type of film you duplicate.

    With ordinary color slide film, you will encounter contrast build-up and you may need to pre-flash the film to correct this.
     
  14. Craig

    Craig Subscriber

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    How about contact printing onto duping film under a colour enlarger? At least then its easy to make colour corrections and there are no intermediate optics.