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  1. #1
    Eric Rose's Avatar
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    Nikkor APO 480mm f9, quick question

    I just received one of these lenses from an APUG member. There is a slider (not the f-stop ring) on the lens barrel. What the heck is it for?

    Eric
    www.ericrose.com
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    "civility is not a sign of weakness" JFK

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  2. #2
    shutterfinger's Avatar
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    Barrel lens with a slot with sliding cover- used for waterhouse stops or drop in filters, your choice.

  3. #3

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    It's probably a flat field correction. I see the lens listed as a copy lens.
    Develop, stop, fix.... wait.... where's my film?

  4. #4
    Shawn Dougherty's Avatar
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    Quote Originally Posted by shutterfinger View Post
    Barrel lens with a slot with sliding cover- used for waterhouse stops or drop in filters, your choice.
    Yep. I used one on 8x10 for several years, great lens. I taped the slot closed, wasn't sure if stray light getting in would cause problems but I was fairly certain it wouldn't help. =)

  5. #5

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    Quote Originally Posted by tkamiya View Post
    It's probably a flat field correction. I see the lens listed as a copy lens.
    Most process lenses have this slot for Waterhouse stops used in making halftones.
    Flat field correction? hardly. These are already flat-field lenses, apochromatic as well.



 

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