Name me one lens you've got that meets this spec

Discussion in 'Digital Cameras' started by RichA, Apr 28, 2011.

  1. RichA

    RichA Guest

    Goes beyond the sensor's resolving power stopped down. The lens
    should be between 35mm and 105mm and the sensor at least 15 megapixels
    APS-C or 23 megapixels in 35mm size. What I'm saying here is that you
    are positive, absolutely certain there is no other lens that would
    provide better resolution. I'll even settle for central image (1/2
    the frame min) resolution only.
     
    RichA, Apr 28, 2011
    #1
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  2. It's better that the sensor resolution exceeds the lens resolution, so
    that aliasing effects are reduced. You are asking the wrong question.

    David
     
    David J Taylor, Apr 29, 2011
    #2
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  3. RichA

    Rich Guest

    That's like saying a 6 megapixel sensor is good because it doesn't tax
    the lenses. What effects have you personally seen that point that you
    can attribute to the lens is superior to the sensor such that the
    extra resolution's benefit is negated?
     
    Rich, Apr 29, 2011
    #3
  4. No, it's completely the opposite.
    Could you please rephrase that question in more comprehensible English.

    David
     
    David J Taylor, Apr 29, 2011
    #4
  5. RichA

    dj_nme Guest

    The most obvious reply to RichA's question is that it would be a
    lens/sensor combination that always produces aliasing/moire patterns in
    (almost) every image produced.
    A less charitable person would point out that the Leica M8, Sigma SD9
    and Sigma SD10 would "fit the bill" with any lenses.
    I wouldn't do that though. ;)
     
    dj_nme, Apr 30, 2011
    #5
  6. []
    Yes, these support what I am suggesting - that the sensor resolution
    should be /better/ than the lens resolution - by being examples of the
    opposite and the problems therefore caused.

    I found Richard's English quite incomprehensible, I'm' afraid.

    Thanks,
    David
     
    David J Taylor, Apr 30, 2011
    #6
  7. RichA

    Rich Guest

    Which lenses have you used that degrade an image because the sensor
    has too many megapixels?
     
    Rich, May 1, 2011
    #7
  8. []
    None. The DSLR I have already has adequate resolution to show the
    imperfections of my lenses. Having greater resolution in the sensor would
    not degrade the image further, and is not something I currently seek.
    Better sensor performance at higher ISO would be, though.

    David
     
    David J Taylor, May 1, 2011
    #8
  9. You're talking as though there's a sharp threshold where lens
    resolution ends. But there isn't. So there's quite a wide grey area
    where increasing lens resolution increases image detail and quality,
    but less then you'd expect, and where more megapixels would improve
    detail resolution and image quality, but again, not as much as you'd
    expect.
     
    Chris Malcolm, May 2, 2011
    #9
  10. However, there are lenses that, IF the manufacturers' data are correct,
    are plenty good enough.

    For example, the Canon 300 mm f/2.8L IS USM and 400 mm f/2.8 IS II USM tele lenses,
    both of which show near-100% MTF at 30 lp/mm wide open.

    Doug McDonald
     
    Doug McDonald, May 2, 2011
    #10
  11. RichA

    John Turco Guest


    English is only Richard Anderson's second language; gibberish is his
    first one, and he speaks it quite eloquently.
     
    John Turco, May 12, 2011
    #11
  12. RichA

    PeterN Guest

    And with no app rant need for forethought.
     
    PeterN, May 12, 2011
    #12
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