• Canon DSLR Cameras

  Canon 5D Mk II – Sigma lenses with black rings?

  Posted by Cade Loven on August 24, 2013 at 8:25 pm

  Hello Friends!

  I’ve been shooting video on the 5D Mk II with the Canon EF 50mm F1.8 lens and I have had great success with it.

  I just bought a Sigma 17-70mm F2.8-4.5 Macro zoom lens and a Sigma 18-200mm F3.5-6.3 zoom lens — they mount on the 5D body just fine, but there are these black rings that appear around the image and I have no idea what they are. This occurs with both of the Sigma lenses. There is an image below.

  Does this have something to do with the full-HD sensor on the 5D vs. crop-sensor lenses? I don’t really understand why there should be a difference if that is the case.

  Canon EOS Mark II
  Shutter Speed 1/40
  Aperture 1/4
  ISO 320
  Focal Length 28mm

  Shot with the Sigma 18-200mm F3.5-6.3 DC

  

  Ryan Holmes replied 12 years, 10 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Warren Eig

  August 25, 2013 at 5:42 pm

  Yes this has everything to do with a crop sensor lens. The Circle of Confusion is too small to project onto a full size sensor. You are seeing the cropped Circle of Confusion.

  Warren Eig
  O 310-470-0905

  email: warren@babyboompictures.com
  website: https://www.babyboompictures.com

  REEL: https://www.babyboompictures.com/BabyBoomPictures/Reels.html
• 

  Ryan Holmes

  August 28, 2013 at 4:42 pm

  In the future you’ll need to verify that the lens your buying will properly cover a full-frame sensor. The lens you bought is appropriate for a crop-sensor camera – like on a 60D, 70D, 7D, t4i, etc. you won’t have any problems. In post you could scale up the footage to get rid of the black ring.

  Or there’s the reshoot filter! 😀

  Ryan Holmes
  http://www.ryanholmes.me
  @CutColorPost

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