How to duplicate a slide

Discussion in '35mm Cameras' started by pslaviero, May 6, 2005.

  1. pslaviero

    pslaviero Guest

    Hi all, I have a Contax bellow with slide copier tool. I've tried to
    use it but once developed the film I've seen that the image is not as
    big as the original one. I've used a 50 mm lens. How can I do to obtain
    better results? Is there a formula to calculate the correct distance
    between slide and camera?
    Thanks all
    P.
     
    pslaviero, May 6, 2005
    #1
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  2. You should set the bellows extension to 50mm (keeping your lens focussed
    at infinity). The slide is then moved until it is in focus: You should
    then have a 1:1 reproduction ratio.

    Getting accurate color & contrast is much more complicated, though...
     
    Chris Loffredo, May 6, 2005
    #2
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  3. pslaviero

    pslaviero Guest

    Well, I'll try this evening. About color, this is not a problem,
    because I use b/w film to obtain reverse slides and particular special
    effects.
    Thank you Chris
    P.
     
    pslaviero, May 6, 2005
    #3
  4. The general rule for macros is that first you set the
    magnification/reproduction ratio (for a 50mm lens, 50mm extension = 1:1,
    for a 100mm lens, 100mm extension = 1:1) and then you "focus" by
    moving closer or further from the subject.

    Insomma, e' pura matematica...
    Buona fortuna!

    Chris
     
    Chris Loffredo, May 6, 2005
    #4
  5. pslaviero

    Alan Browne Guest

    With the proper head (geared focus axis) this is the way to go.

    But if you're using a ball head or pan-tilt, then you sometimes have to
    accept slightly less than 1:1 or spend a long time moving the legs til
    you get it right.

    In the studio moving to focus is relatively easy because of smooth
    floors, the legs can slide along. In the woods, trying to focus by
    moving the camera in and out is tedious at best.

    Cheers,
    Alan.
     
    Alan Browne, May 6, 2005
    #5
  6. pslaviero

    Matt Clara Guest

    Yes, but he's talking about a bellows, which allows for the camera to slide
    back and forth with the twist of a dial.
     
    Matt Clara, May 7, 2005
    #6
  7. pslaviero

    Alan Browne Guest

    Oh. There I go jumping in w/o reading it all ... again. It's a great
    bad habit.

    Cheers,
    Alan
     
    Alan Browne, May 7, 2005
    #7
  8. pslaviero

    Matt Clara Guest

    I am awesome at that, particularly before 9 am.
     
    Matt Clara, May 7, 2005
    #8
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