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  1. #1

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    f2.0 stop in Nikkor 50 f1.8 ai?

    Deciding to go back film after many years. I just got a Nikkor 50 f1.8 AI (from the serial number it likely comes from 1979). It is in stellar condition but seems to have an extra f-stop at ~2.0. Having never used one of these lenses, I don't know if this is normal. Anyone run into this? Focus seems on from the limited shots that I've taken so far.

  2. #2
    2F/2F's Avatar
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    If it is anything like my Nikkor-Q 135mm f/3.5, then this is normal. It has an unmarked stop at f/4. My Canon FD 55mm f/1.2 S.S.C. has an unmarked stop at f/1.4 as well. I am glad that they do!
    2F/2F

    "Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."

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  3. #3

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    I think this is a sort of half stop between f/1.8 and f/2.8. It would be very difficult to make a 50mm lens with click stops at both f/1.8 and f/2.

  4. #4
    KenFretz's Avatar
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    Standard f stops

    The f1.8 is 1/3 of a stop faster than the standard sequence of f 4.0, f2.8, f2.0, f1.4, so a stop at f2.0 is the normal position, there just isn't room to mark in on the lens. Nikon originally made 50mm lenses in f2.0 and f1.4 but as part of a marketing move in 1978 they started making the lower priced lens with a maximum aperture of f1.8 to make it seem that you were getting more.

  5. #5
    Denis R's Avatar
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    normal

    my 50 1.8 D AF has 1.8 2 2.8 4 5.6 8 11 16 22 "click" stops

    confimed on my N8008s
    Kodak Duaflex II with kodet lens
    N75 N8008s D60
    Yashica - D
    Only a photographer knows the true value of infinity

  6. #6

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    Thanks all - I appreciate the feedback. Sold all of my film Nikon gear 15+ years ago and have been using digital. Never had an f1.8 lens anyway so I was worried that I may have gotten a lemon. Thanks again.

  7. #7

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    This lens has that indent for F2, I've actually modified a few so that they have 1/3 steps at least to f4.

  8. #8
    PhotoJim's Avatar
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    Quote Originally Posted by KenFretz View Post
    Nikon originally made 50mm lenses in f2.0 and f1.4 but as part of a marketing move in 1978 they started making the lower priced lens with a maximum aperture of f1.8 to make it seem that you were getting more.
    Not only did it seem like you were getting more... you were getting more! 1/3 stop more.

    To be sure, the f/2 50mm Nikkor is a great lens, but if 1/3 stop has no value, why did Nikon ever bother making an f/1.2 lens when it already had an f/1.4?
    Jim MacKenzie - Regina, Saskatchewan, Canada

    A bunch of Nikons; Feds, Zorkis and a Kiev; Pentax 67-II (inherited from my deceased father-in-law); Bronica SQ-A; and a nice Shen Hao 4x5 field camera with 3 decent lenses that needs to be taken outside more. Oh, and as of mid-2012, one of those bodies we don't talk about here.

    Favourite film: do I need to pick only one?

  9. #9
    rthomas's Avatar
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    I've owned several 50mm f/1.8 Nikkors over the years and they all had an unmarked detent at f/2, and that is how it meters as well.

    I don't think it would be that difficult to make a lens with 1/3 stop increments. My Pentax screwmount lenses have 1/2 stop indents at most settings, and I know at least one Nikkor lens that had 1/3 stop settings: the 105mm f/4 bellows lens.



 

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