Black corners in photos (not vignette)

Discussion in 'Canon Cameras' started by Adam Lewis, Apr 10, 2019.

  1. Adam Lewis

    Adam Lewis TPF Noob!

    Joined:
    Apr 10, 2019
    Messages:
    8
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    I have recently been shooting with the Canon G7X Mark II, as it's more portable and less "in your face" than my 5DIII. I've noticed that in all of my images, the corners are a solid black colour, and it isn't vignetting. I've been shooting for years and I know what a vignette looks like :')
    Regardless, it's a pain to edit in post and I don't want to crop my images down to rid them of these black corners. I was wondering if it's the IS that's causing it or whether there's a technical fault with the camera itself. I'll provide sample images if I can, this is my first time on this forum site.
    Please let me know if any of you have had a similar issue and/or how to go about resolving it. Any and all help is greatly appreciated!


     

    Attached Files:

  2. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

    Joined:
    Mar 8, 2011
    Messages:
    23,864
    Likes Received:
    8,557
    Location:
    Iowa
    Can others edit my Photos:
    Photos NOT OK to edit
    Does it happen only when shooting with the lens at the wide end, or across all focal lengths?

    The transition is too sharply defined to be optical or mechanical vignetting. I suspect it's more a digital processing issue.

    A quick Google search found this:
    Solved: G7xii vignetting - Canon Community
     
  3. Adam Lewis

    Adam Lewis TPF Noob!

    Joined:
    Apr 10, 2019
    Messages:
    8
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    All of the photos in this set are all shot at the wide end (24mm equiv.), and they all look fine in camera but when I import them into my editing software (Affinity Photo), they all have the same issue
     
  4. Ysarex

    Ysarex Been spending a lot of time on here!

    Joined:
    Nov 27, 2011
    Messages:
    6,293
    Likes Received:
    2,900
    Location:
    St. Louis
    Can others edit my Photos:
    Photos OK to edit
    I use a G7xmkII and I just checked with Affinity Photo (Windows version) and don't get that result. The only photos I had at that focal length were landscapes. I'll check with a photo similar to the one you posted and get back in a few minutes.

    Joe
     
  5. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

    Joined:
    Mar 8, 2011
    Messages:
    23,864
    Likes Received:
    8,557
    Location:
    Iowa
    Can others edit my Photos:
    Photos NOT OK to edit
    It seems it's a result of shooting raw, not JPEG.
     
  6. Adam Lewis

    Adam Lewis TPF Noob!

    Joined:
    Apr 10, 2019
    Messages:
    8
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    I always shoot RAW, so you might be right there. I'll take a sample shot of plain white wall and see if it has the same result and report back in a minute
     
  7. Adam Lewis

    Adam Lewis TPF Noob!

    Joined:
    Apr 10, 2019
    Messages:
    8
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    Okay, so the plain white wall has no black corners, though I shot it RAW, but it does have like a reverse/inverted vignette where it gets brighter in the corners. I am able to edit the black corners out in post processing but it's a bit of a pain in the neck
     
  8. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

    Joined:
    Mar 8, 2011
    Messages:
    23,864
    Likes Received:
    8,557
    Location:
    Iowa
    Can others edit my Photos:
    Photos NOT OK to edit
    I wonder if it's a product of shooting raw....... in that there's no lens correction (pin-cushioning or barrel) applied to the raw image.
     
  9. Ysarex

    Ysarex Been spending a lot of time on here!

    Joined:
    Nov 27, 2011
    Messages:
    6,293
    Likes Received:
    2,900
    Location:
    St. Louis
    Can others edit my Photos:
    Photos OK to edit
    I can't replicate the issue using Affinity Photo raw or JPEG that's not happening with my copy of Affinity.

    Now I can do this using RT and removing the lens profile.

    g7_lens.jpg

    I agree it's a raw/lens profile issue one way of the other but Affinity should (and in my case does) apply a lens profile.

    Joe
     
  10. Adam Lewis

    Adam Lewis TPF Noob!

    Joined:
    Apr 10, 2019
    Messages:
    8
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    That's valid, it could be the barrel of the lens. That's all I can think of as a rational explanation right now
     
  11. Adam Lewis

    Adam Lewis TPF Noob!

    Joined:
    Apr 10, 2019
    Messages:
    8
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    I'll see about the lens profiling and get back to you, I'll honestly be kicking myself if that's what's wrong haha
     
  12. Ysarex

    Ysarex Been spending a lot of time on here!

    Joined:
    Nov 27, 2011
    Messages:
    6,293
    Likes Received:
    2,900
    Location:
    St. Louis
    Can others edit my Photos:
    Photos OK to edit


    I got it -- you had the camera set to macro mode when you shot the cat. The exact same happened to me: widest angle focal length + macro setting + close subject + Affinity Photo. Problem is definitely Affinity Photo and a failure to provide a good lens profile for the camera. Other raw converters don't do that.

    Joe
     

Share This Page