Canon lens vignetting demo with FF sensors

Discussion in 'Digital Photography' 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.

    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.

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

    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
    Malcolm Stewart, Feb 18, 2006
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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
  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
    Kennedy McEwen, Feb 19, 2006
  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
  6. I fail to understand the obsession people have with vignetting. If you
    don't like it fix it in Photoshop just like we did in the darkroom
    with wet processing.

    Secondly, in January at a printing seminar, the noted landscape
    photographer taught the intentional production of a vignetting effect
    to enhance the image and keep the viewers eye centered on the primary
    subject. I would also point out that Ansel Adams did the same thing
    by intentionally darkening the corners of his LF prints to produce


    "A combat photographer should be able to make you see the
    color of blood in black and white"

    David Douglas Duncan
    Speaking on why in Vietnam
    he worked only in black and white
    John A. Stovall, Feb 19, 2006
  7. Mark²

    Mark² Guest

    Did I write something that indicated an obsession with vignetting?
    Mark², Feb 19, 2006
  8. 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 van der Wolf, Feb 19, 2006
  9. Sir yes Sir, but imho that noise increase should need something like a
    2 ou 3-stop vignetting to be apparent, not something really common in
    real world (unless shooting at 12mm FF or so)?

    I must admit I also agree with the proposal to make, by default, a bit
    of vignetting to keep the interest of the reader in the center (ie not
    in the corners) of the image.
    nikojorj_jaimepaslapub, Feb 19, 2006
  10. Mark²

    Mark² Guest

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

    Bill Funk Guest

    So you always want your subject focus to be tucked all the way into a
    Bill Funk, Feb 19, 2006
  12. 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

    Mark², Feb 19, 2006
  13. 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
  14. A 50mm at f/1.4 or f/2.0 can get a light fall-off of approx. 1.5 to
    2.5 stops:
    And I've seen some zoomlenses probably doing worse, even at smaller

    Bart van der Wolf, Feb 19, 2006
  15. 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, Feb 20, 2006
  16. What I thought is that, in the few cases where both there is heavy
    vignetting (seems I'm underestemating this, but I don't shoot FF since
    4 years anymore) and it is unwanted, it can be corrected at a very
    reasonable image quality expense.

    I think also we all do agree to that!
    But, in my particular case, it simply won't be the main criterion...
    nikojorj_jaimepaslapub, Feb 21, 2006
  17. 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
  18. 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
  19. 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
  20. Mark²

    Mark² Guest

    Vignetting is exclusive to Canon?

    It's just that Nikon has yet to make use of their 35mm lenses yet with their
    Not this Canon shooter!
    Mark², Feb 22, 2006
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