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Thread: 65mm Grandagon for color enlarging

  1. #1

    65mm Grandagon for color enlarging

    Can it be used?

    Reverse-mounted on a home-made lensboard, stopped to f22.
    Negative size: 6x7, shot with a Pentax, 55mm, f16, heavy tripod.
    Enlargement ratio: 32x >> 70x88" print.
    Dichroic head, Ultra Endura N, Fuji CPRA juice.
    Sharpness/contrast requirements: considerable.

    Any suggestions, advices, warnings - GREATLY APPRECIATED!

    LFrtb

  2. #2
    Daniel Stone's Avatar
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    Re: 65mm Grandagon for color enlarging

    may I ask why a Grandagon? I'd imagine it COULD work, but I don't think you'll want a curved field lens(which I believe a Grandagon is, vs a FLAT-FIELD lens(macro and enlarging lenses))

    and a 65mm is a little too short IMO to enlarge 6x7 with. The WA perspective throws things way out. I've found a 90mm-135mm the best for proper enlarging, even large enlargments from 6x7 negs.

    -Dan

  3. #3

    Re: 65mm Grandagon for color enlarging

    Dan,

    The reasons: size of the darkroom (8x8ft), the negatives which
    I already have and the required print size. I do have a 105mm
    Rodagon-G, which works beautifully, but can't move to a larger
    darkroom any time soon. This Grandagon was offered to me for
    a very good price (it has a slight mark on the rear glass) and
    so this seems as a quick and dirty solution. Do you know of
    a lens in the 60-70mm range that might be good for enlarging
    to this size? I thought about using the 55mm lens that these
    negatives were shot with, but mounting it to the enlarger
    would require two expensive adapters - hence the idea for
    reverse mounting using inexpensive filter holders.

  4. #4

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    Re: 65mm Grandagon for color enlarging

    Really excellent enlarging lenses can be had very cheaply. The Grandagon lens is really not optimized for enlarging purposes and I suspect would not be as good as a dedicated enlarging lens.

    I have used a Schneider Componon-S lens in 80mm f:5.6 for 6x7 and it works very well. Some would prefer a longer lens in the 90-100 mm range.

    In any event, I would not go to the trouble of trying to use a LF lens, at least not that LF lens for this job.

  5. #5
    Drew Wiley
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    Re: 65mm Grandagon for color enlarging

    I'd imagine a Grandagon would make a horrible enlarging lens. For 6x7 I personally
    recommend an enlarging lens in the 105 to 135mm range, although a 90 would be OK.
    What I actually use, however, is a 150 Apo-Rodagon.

  6. #6

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    Re: 65mm Grandagon for color enlarging

    60mm WA enlarging lenses from Schneider or Rodenstock are none too common and still fetch something of a premium, but they are what you want. Occasionally a 60mm WA enlarging lens from Bogen shows up on ebay, but I know nothing of its performance. The Grandagon is not what you want for the reasons given above, but in any case you do not want to reverse it - unless you are trying to make a print that is smaller than the negative.
    Last edited by aduncanson; 9-Sep-2010 at 13:41. Reason: Deleted comments addressed previously by OP

  7. #7

    Re: 65mm Grandagon for color enlarging

    Drew,

    The sizes are the problem here - the required size of the print and the size of my darkroom. The maximum distance from the lens to the wall easel I can work with
    at present is around 7', and the 6x7 negative has to be enlarged to over 80" width.
    I understand a camera lens might work well at very large enlargement ratios, such
    as 30-35x. But how to keep it parallel to the negative with two or three adapters
    needed to mount it on the enlarger?

    LFrtb

  8. #8

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    Re: 65mm Grandagon for color enlarging

    developing a print this big isn't easy either, unless you have a professional developing machine... you could avoid a lot of trouble by scanning the negativ and continue the digital path.

  9. #9
    W K Longcor
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    Re: 65mm Grandagon for color enlarging

    One other "why is should not be done" that I do not think any one else mentioned --- illumination problems. That wide angle lens will be looking at light (or lack of it) coming from the edges of the light source -- behind the negative. I think you will be driving youself crazy trying to get even illumination across the print -- unless you have a large format enlarger with a really big light source -- and by the sound of your problem - you don't.

  10. #10

    Re: 65mm Grandagon for color enlarging

    W K,

    Do you think the evenness of illumination would still be a problem with the
    105mm Rodagon-G lens? Is it much more pronounced on colour print this large
    than in a black & white print on 30x40" graded FB paper?

    LFrtb

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