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Thread: Unknown process lens

  1. #1
    45-57-617
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    Unknown process lens

    In a bid to increase our collective wisdom ... (calling Dan Fromm ...)

    here is a Nikon Process lens of 240mm length and f10 ....

    https://www.ebay.com/itm/Process-Nik...UAAOSwcaZcaioD

    The information garnered by Mr Fromm (all hail Mr Fromm) that I have seen does not include this one.

    See the weird extended lens cap too.

  2. #2
    ic-racer's Avatar
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    Re: Unknown process lens

    Why is it not known? Looks like a 4 element 1:1 70 or so degree Nikkor process lens.

  3. #3

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    Re: Unknown process lens

    I don't think you looked very hard. See Section 2 of http://www.galerie-photo.com/apo-pro...ikkors-en.html

    It is a smaller version of the 260/10 Nikkor-Q I used to own.

    Nikon says that the f/10 Process Nikkors (early ones are badged Nikkor-Q) are not to be used at magnifications lower than 1:2. In other words, not good for general purpose photography.

    The eBay vendor has made the common convenient eBay vendor mistake of treating coverage at 1:1 as coverage at infinity. A 240 mm lens that covers 720 mm at infinity would cover a hair more than 112 degrees.

  4. #4

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    Re: Unknown process lens

    Quote Originally Posted by ic-racer View Post
    Why is it not known?
    See post #3 above.

    Cheers,

    Dan

  5. #5
    45-57-617
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    Re: Unknown process lens

    Thanks Dan.

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