EF 50/1.8 AF Experiment?

Discussion in 'Digital SLR' started by Wilba, Dec 20, 2009.

  1. Wilba

    MikeWhy Guest

    I swear by gumb. 40x0.1mm should be cause enough to wrap you in padding and
    committed. I can't empathize, but I'm pleased to see an active curiousity
    live on in the this world.

    For a short time, depending on how the forum moderators feel about
    appropriateness, a no effort nifty-fifty shot is at:
    http://photo.net/no-words-forum/00W8Os. Nothing special; this quality of
    focus is routine. It was just happened to be up in LR as your last post
    popped into my newsreader.
    MikeWhy, Apr 1, 2010
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  2. Wilba

    Wilba Guest

    I had a spare 1/2 hour and gear that would do it, so why not? :- )
    Anyone can do that at f/4. :-D
    Wilba, Apr 2, 2010
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  3. Both.
    Chris Malcolm, Apr 2, 2010
  4. Wilba

    Wilba Guest

    And that's what it's all about. :- )

    I think you hinted at an explanation a couple of posts ago - "Therefore in a
    spherical lens the AF sensor finds exact focus at the point where the rays
    from that particular part of the spherical lens surface focuses." If the
    rays from that particular part of the lens surface _cannot_be_ exactly
    focused, then how likely is it that exact focus in the centre of the image
    can be achieved using those rays? I haven't seen a better explanation.
    Wilba, Apr 2, 2010
  5. Wilba

    MikeWhy Guest

    That was 4 months ago.
    My point exactly.
    MikeWhy, Apr 2, 2010
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