55mm Nikon Micro AIS

Discussion in 'Nikon' started by Matt Clara, Jun 30, 2004.

  1. Matt Clara

    Matt Clara Guest

    Is this considered a flat-field lens?
     
    Matt Clara, Jun 30, 2004
    #1
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  2. Yes, and a good one at that.

    Geoff.
     
    Geoffrey S. Mendelson, Jun 30, 2004
    #2
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  3. Matt Clara

    Dallas Guest

    Matt Clara said:
    Haven't heard that expression before, but I did recently swap one of those
    for a Canon F1N body. I have extension tubes for my F2 and Nikkors, so if
    I ever need to do macro photography I am sure those would help.
     
    Dallas, Jun 30, 2004
    #3
  4. Matt Clara

    Matt Clara Guest

    Flat field lenses are for reproducing documents or artwork--ya know, flat
    stuff... :)
    My photography needs to start generating revenue, and this is something I
    should be able to offer as a service
     
    Matt Clara, Jun 30, 2004
    #4
  5. Matt Clara

    brian Guest

    Virtually *all* photographic lenses are designed to have a flat field.
    There are only rare exceptions, and the 55mm micro is not one of
    them. The 55mm micro is one of the best-corrected photographic lenses
    you can buy, both for close-up and distant work. Of course its a flat
    field lens!

    Brian
    www.caldwellphotographic.com
     
    brian, Jul 1, 2004
    #5
  6. Matt Clara

    Matt Clara Guest

    Mr. Caldwell indicates I'm spreading disinformation--the 55mm Nikon Macro is
    spoken of as a great lens for the above kind of copy work, and I've heard
    said that's because it's an excellent flat-field lens. Mr. Caldwell
    indicates that it's very well corrected, and perhaps that's really the
    reason it's great for copy work.
     
    Matt Clara, Jul 1, 2004
    #6
  7. Matt Clara

    brian Guest

    Exactly how did I indicate that you're spreading disinformation??

    Brian
    www.caldwellphotographic.com
     
    brian, Jul 2, 2004
    #7
  8. Matt Clara

    Matt Clara Guest

    I didn't intend it as an insult, I'm merely correcting the disinformation
    I've been apparently spreading. When you corrected my understanding of
    flat-field lenses, I felt beholden to modify what I'd said to Dallas about
    flat-field lenses for copy work. Please elaborate on lenses for copy work
    if you're able.
     
    Matt Clara, Jul 2, 2004
    #8
  9. Matt Clara

    brian Guest

    No insult felt - I was concerned that I might have done the insulting.
    Another example of online miscommunication!

    As I said earlier, most photographic lenses are designed to work best
    on a flat image field. Perhaps its better to say that they are
    designed to have a flat image field for distant subjects. If this
    weren't the case, then you would have poor edge definition for objects
    at or near infinity.

    When you focus away from a lens' optimum magnification you will
    normally induce astigmatism which effectively changes the shape of the
    optimum image surface. Coma, distortion and other aberrations also
    get introduced, but these don't effect field flatness. By moving at
    least two groups of elements independently you can avoid this to a
    great extent. Using this technique, the 55/2.8 achieves a very stable
    aberration balance throughout its entire focusing range. In
    particular, the optimum image surface remains flat for all object
    distances.

    Brian
    www.caldwellphotographic.com
     
    brian, Jul 2, 2004
    #9
  10. This is my own understanding, based only on 20 years in photography, so
    please feel free to disagree:

    It IS a "flat field lens", but isn't "considered" one.

    There are dedicated lenses designed solely for repro work, that are
    designated flat-field lenses. That is, the optical design sacrifices
    other characteristics (like freedom from lens flare, etc) for the best
    possible resolution over a flat plane, and usually within a rather
    narrow range of reproduction ratios.

    That said, the Micro Nikkor will be all the "flat field" lens you're
    ever likely to need. It's characteristics for this purpose are
    excellent; I've done large amounts of copy work with that lens and it's
    predecessors, and have always had excellent results.

    Taking the stick by the other end, the only common lens specifically
    intended for other than a flat field would be the Ektanar-C, for slide
    projectors.
     
    Scott Schuckert, Jul 3, 2004
    #10
  11. Matt Clara

    Matt Clara Guest


    Thanks, Brian!
     
    Matt Clara, Jul 4, 2004
    #11
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