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  1. #1
    DanielStone's Avatar
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    jam-nut size questions(EL-NIKKORS)

    hey all,

    I'm currently watching a 210mm el-nikkor on the 'bay, for my 4x5 negs, but it doesn't have a retaining ring(jam nut) included with it.

    also, I just received a 63mm (3.5, NOT 2.8) el-nikkor in the mail, and it doesn't have one either, so I'll need one for it too.

    planning on making some masonite lensboards anyhow .

    any ideas of where I can get one for EACH, and how much they would cost?

    thanks

    -Dan

  2. #2
    ann
    ann is offline

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    I would think b&h and freestyle would have them, think at least 10-15 dollars.
    http://www.aclancyphotography.com

  3. #3
    Jim Jones's Avatar
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    I've also used Leica Thread Mount flanges and extension tubes for jam nuts on enlarging lenses.

  4. #4
    Dan Henderson's Avatar
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    Isn't 210mm kind of long for enlarging 4x5 negatives?


    web site: Dan Henderson, Photographer.com

    blog: https://danhendersonphotographer.wordpress.com/

    I am not anti-digital. I am pro-film.

  5. #5
    Ian Grant's Avatar
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    As Dan says you'll struggle using a 210mm for 5x4, it'll hamper making decent sized enlargements.

    A 135mm Copmonon/Componon S is designed for 5x4 and is a very practical focal length for a bench enlarger, if your enlarger is floor standing then q 150mm is a good choice as well.

    Ian

  6. #6

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    The 63mm Nikkor should be a 39mm (leica) thread. The jam nuts are common enough. I agree with the others that you should be looking for a 135-150 for your 4x5 negs.

  7. #7
    dentkimterry's Avatar
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    The 210mm EL-Nikkor takes a 72mm retaining ring. The 63mm f2.8 takes a 39mm ring. Don't know about the f3.5. Not sure where you can get one. Maybe Nikon parts has one.

    Terry

  8. #8
    Mike Wilde's Avatar
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    I have DIY'ed a square plate aluminum lens board and fimo modelling clay jamb nut when I owned a Beselar 23 and was shy on a board for a rarely used lens to cover 6x9, since I principally shot 6x6.

    I put the lens though the hole in the board (mine had a hole that was a tad oversized), and rolled the Fimo into a long round ribbon that I wrapped around the protruding threads and pressed into place. I left it to dry for a few days, and then trimmed excess that had been 'extruded' on the far side with a sharp knife. I took a Sharpie black marker to the dried clay , and that was that. We were good to go.
    my real name, imagine that.

  9. #9

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    Just to add to Mike Wilde's post,I did something similar with a 150 EL-Nikkor,which has an exotic and hard to obtain jamb nut.
    I used epoxy putty,and greased the thread on the lens with petroleum jelly before assembly.
    The lens can be unscrewed if required.

  10. #10
    ic-racer's Avatar
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    SK Grimes will make what you need if you can't find one. Look around first. Mike123 had a bunch of flanges (I got a 75mm from him) and rings but he is gone now.

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