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Thread: 12x20 enlarger lens suggestions

  1. #11

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    Re: 12x20 enlarger lens suggestions

    Quote Originally Posted by wborders View Post
    Hi Everyone,

    I'm looking for an enlarger lens that I can use to double my 12x20 negative to get a 24x40 print. Specific recommendations would be very helpful.

    Thanks
    As it is only a 2x enlargement you can use your taking lens working as enlarging lens without noticing a flaw in the print. Major issue would be focus flatness, but you can stop severely the lens to gain the DOF that overcomes that problem.

    At the end you need only 6 lp/mm in the print, this is resolving 12 lp/mm in the negative carrier plane, so you can stop to f/64 (even f/90 !) for the dof sake without noticing a flaw in the print. (IMHO)

    Using the taking lens as the enlarging lens has a wide historic record, of course this has drawbacks compared to dedicated enlarger glass, but IMHO you are not to see that at all in a x2 enlargement, as today you can throw a lot of (little heat) LED light to the diffuser, say 100w led (0r 200), and then stopping a lot for dof.

    I used a Sironar-N 300 MC for tests in a DIY enlarger, and it was not working bad at all for x4 enlargements, if stopping enough for focus flatness. For x4 enlargement the lens can be stopped to 45 (or even 64) without diffraction damaging on paper resolution. Nobody can see more than 6 line pairs per mm in a print, even with nose on it, not necessary to speak about it if the 40" print is viewed at the distance that people normally observe a 40" thing.

    As you already have your taking lens, there is nothing wrong in to try with it.

  2. #12
    Drew Wiley
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    Re: 12x20 enlarger lens suggestions

    450 Apo Nikkor dialyte.

  3. #13

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    Re: 12x20 enlarger lens suggestions

    Quote Originally Posted by Drew Wiley View Post
    450 Apo Nikkor dialyte.

    Yup or just about any process lens of that focal length or longer.

  4. #14
    Drew Wiley
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    Re: 12x20 enlarger lens suggestions

    A 600 Apo Nikkor would be even better optically, but I didn't mention it because it would need a bellows as long as a whale at that magnification.

  5. #15

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    Re: 12x20 enlarger lens suggestions

    12X20 is a nice size to contact print...

    Not big enough??? (You can also include an oversize overmat)

    Steve K

  6. #16

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    Re: 12x20 enlarger lens suggestions

    To shrink that whale just a bit...might you consider something like a 14" Blue-Dot Trigor? I had amazing luck with this lens (for photographing) on 11x14 awhile ago...and am thinking that its design might just make it appropriate for your desired use as a moderate wide enlarging lens.

  7. #17

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    Re: 12x20 enlarger lens suggestions

    Quote Originally Posted by John Layton View Post
    To shrink that whale just a bit...might you consider something like a 14" Blue-Dot Trigor? I had amazing luck with this lens (for photographing) on 11x14 awhile ago...and am thinking that its design might just make it appropriate for your desired use as a moderate wide enlarging lens.
    So would a 14" G-Claron, but I just don't think it's ever going to happen!

  8. #18
    Drew Wiley
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    Re: 12x20 enlarger lens suggestions

    Trigors seem to either come free on some thrown-out process camera, or cost a couple thousand bucks from someone who actually knows what they are.

  9. #19
    Randy Moe's Avatar
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    Re: 12x20 enlarger lens suggestions

    Let's go with the 600 APO Nikkor. He wants 2/1. He needs 50" of bellows.

    Right?

    Which is not that big a problem horizontally.

    I have shot my 900 mm Jena 2/1 with 72" bellows on an S11.

  10. #20
    Randy Moe's Avatar
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    Re: 12x20 enlarger lens suggestions

    Incorrect. AGAIN!

    Read this. http://www.largeformatphotography.in...p/t-47959.html


    Quote Originally Posted by Randy Moe View Post
    Let's go with the 600 APO Nikkor. He wants 2/1. He needs 50" of bellows.

    Right?

    Which is not that big a problem horizontally.

    I have shot my 900 mm Jena 2/1 with 72" bellows on an S11.

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