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Thread: Why 55mm f/4.5 Apo-Grandagon *and* 55mm f/4.5 Grandagon-N?

  1. #21
    Jac@stafford.net's Avatar
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    Re: Why 55mm f/4.5 Apo-Grandagon *and* 55mm f/4.5 Grandagon-N?

    Dan, is that not what I wrote? There is some kind of crazy going on here.

    ... and the misquote is not appreciated.

  2. #22

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    Re: Why 55mm f/4.5 Apo-Grandagon *and* 55mm f/4.5 Grandagon-N?

    Quote Originally Posted by Jac@stafford.net View Post
    Dan, is that not what I wrote? There is some kind of crazy going on here.

    ... and the misquote is not appreciated.
    I didn't quote you at all. And you've forgotten what you wrote:

    Two things - it is not sharp until ƒ/16 or ƒ22, and those are coincidentally the apertures required with Rodenstock's center filter.
    Two stops down from f/4.5 is f/9.

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