Canon lens vignetting demo with FF sensors

Discussion in 'Canon' started by Mark², Feb 18, 2006.

  1. Mark²

    Mark² Guest

    Here's an interesting site that has created a very nice demonstration of a
    large number of Canon lenses...showing how much vignetting is present at
    various focal lengths.

    http://tinyurl.com/bjru8

    It takes a little fiddling to figure out how the page is set up, but click
    on the different options above the samples, and you'll get the idea. If you
    click on "Contour Results," you can choose the lens, the focal length, and
    the aperture value...for a very detailed view of the frame, complete with EV
    zones within the frame.

    -Mark
     
    Mark², Feb 18, 2006
    #1
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  2. Thanks for the link - the vignetting stuff has been added since I last
    visited.

    If anything, he seems even keener now on zooms than I recall. Pity that the
    L zooms are somewhat large and heavy - I prefer not noticing what I'm
    carrying.
     
    Malcolm Stewart, Feb 18, 2006
    #2
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  3. Mark²

    Skip M Guest

    I notice that his 16-35 and 17-40 vignette tests include a standard UV
    filter. That could contribute significantly to the vignetting, I'd think...
     
    Skip M, Feb 19, 2006
    #3
  4. There are comparisons with and without filters, which are only included
    at the wide end - hover the mouse over the thumbnail and it shows the
    data.
     
    Kennedy McEwen, Feb 19, 2006
    #4
  5. Mark²

    Skip M Guest

    There are comparisons with and without filters, which are only included at
    the wide end - hover the mouse over the thumbnail and it shows the data.[/QUOTE]

    Oh. I just wasn't patient enough, just hovered the mouse over a few of
    them. I guess, coincidentally, over the ones with the filter.
     
    Skip M, Feb 19, 2006
    #5
  6. Mark²

    Mark² Guest

    Did I write something that indicated an obsession with vignetting?
     
    Mark², Feb 19, 2006
    #6
  7. When you 'fix' it in Photoshop, the fixed parts have more Photon shot
    noise due to underexposure, and that extra noise is further increased
    by post-processing it.

    Bart
     
    Bart van der Wolf, Feb 19, 2006
    #7
  8. Mark²

    Mark² Guest

    So you always want your subject focus to be dead-center in the frame??????
     
    Mark², Feb 19, 2006
    #8
  9. Mark²

    Bill Funk Guest

    So you always want your subject focus to be tucked all the way into a
    corner??????
    :)
     
    Bill Funk, Feb 19, 2006
    #9
  10. Mark²

    Mark² Guest

    Neither assumption about framing is logical...which to me only points to why
    it's reasonable for people to want to avoid heavy optics-based vignetting.
    I can't for the life of me figure why some here insist that vignetting is an
    inherently "good thing." It can be useful or harmful. As for me, I'd like
    to know the way different lenses handle it, and this is why I find the site
    useful.

    Mark
     
    Mark², Feb 19, 2006
    #10
  11. Mark²

    Bill Funk Guest

    Neither do I.
    I can see how it might be useful to introduce vignetting in some pics,
    but certainly not by default.
     
    Bill Funk, Feb 19, 2006
    #11
  12. A 50mm at f/1.4 or f/2.0 can get a light fall-off of approx. 1.5 to
    2.5 stops:
    http://www.xs4all.nl/~bvdwolf/main/foto/Imatest/Vignetting_50mm.png
    And I've seen some zoomlenses probably doing worse, even at smaller
    apertures.

    Bart
     
    Bart van der Wolf, Feb 19, 2006
    #12
  13. Mark²

    Rich Guest

    So what is the ultimate cause? The lenses, or is it the lens mount
    diameter on the camera? In other words, could they make lenses that
    woudn't suffer from it?
    -Rich
     
    Rich, Feb 20, 2006
    #13
  14. Mark²

    Stacey Guest

    Because it's worse than with film and no all digital cameras do it.

    It's not like you can recreate the missing infiormation.
    It's nice to have a choice, not all images benefit from this. One could just
    as easily argue "Look at the interesting images made with a holga,why do
    you need anything better?"
     
    Stacey, Feb 22, 2006
    #14
  15. Mark²

    Stacey Guest

    Because it's something that their beloved Canon optics do. If water sprayed
    out of the back of a canon camera when you pressed the shutter, they'd
    argue that it feels good on a hot summer day.
     
    Stacey, Feb 22, 2006
    #15
  16. Mark²

    Mark² Guest

    He can sugar-coat it all he wants, but I would call that, "Making the best
    of a limiting factor."
    :)
     
    Mark², Feb 22, 2006
    #16
  17. Mark²

    Mark² Guest

    Vignetting is exclusive to Canon?

    No.
    It's just that Nikon has yet to make use of their 35mm lenses yet with their
    DSLRs.
    :)
    Not this Canon shooter!
    :)
     
    Mark², Feb 22, 2006
    #17
  18. Mark²

    Stacey Guest

    Dare I say the word...... telecentric?
     
    Stacey, Feb 22, 2006
    #18
  19. Mark²

    Skip M Guest

    Hi, Stacey! Got my 20 bucks ready? (remember, you bet me $20 that I'd be
    upgrading on the next Canon camera announcement. You lose.) ;-)
     
    Skip M, Feb 22, 2006
    #19
  20. Mark²

    Skip M Guest

    Except your Oly lenses are no more telecentric than a 16-35 Canon on a 20D.
    All they do, in both cases, is crop to the center "sweet spot."
     
    Skip M, Feb 22, 2006
    #20
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