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Beseler Lens Boards - Not All The Same?

Discussion in 'Darkroom Equipment' started by marcmarc, Feb 18, 2010.

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  1. Feb 18, 2010 #1
    marcmarc

    marcmarc Member

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    Hi Everyone,

    I took a look at the owners manual for my Beseler 23CII and noticed that there are different numbers for different boards based on focal length. I've been using a 100mm lens for my 6x7 negs in both a Besler 4x5 enlarger as well as the 23C. However, I also shoot 135 and have a 50mm lens. Can't I use the same board for my 50mm as I have the 100mm in? It's the only board I have right now. Thanks for replies.
     
  2. Feb 18, 2010 #2
    Jon Shiu

    Jon Shiu Subscriber

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    If it is a flat board, it will probably work fine, unless you need to make larger than about 11x14 enlargements. That would require a slightly recessed board so the lens can get closer to the negative in order to focus.

    Jon
     
  3. Feb 19, 2010 #3
    rmann

    rmann Subscriber

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    Larger lens on the 4x5 may need a different board so the rear element can clear the metal that is part of the turret attachment - I think it starts to be a concern with 180mm designs and up.
     
  4. Feb 19, 2010 #4
    ricksplace

    ricksplace Member

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    I use a beseler 23C and a 45MX. The lensboards are interchangeable between the two. As far as I know, the boards are all the same, the only difference being the size of the hole in the board. (except for the extended or recessed boards)
     
  5. Feb 19, 2010 #5
    mikebarger

    mikebarger Subscriber

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    It may also indicate a different length of the light tube.

    Mike
     
  6. Feb 19, 2010 #6
    fotch

    fotch Member

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    I have never seen a turret attachment that uses the 4x4 board. The only turret attachment that I am aware of fits only the MXT and the lens screw right into it.

    Is there another one?
     
  7. Feb 19, 2010 #7
    rmann

    rmann Subscriber

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    Yes, you are correct - I was thinking of the VXL.