Why does my Sigma 35mm f/1.4 Art show a large circular artifact on a Canon 6D Mark II?
Asked 4/23/2020
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I’m using a Sigma 35mm f/1.4 DG HSM Art on a Canon 6D Mark II and seeing a large double “onion ring” or circular artifact in the center of my images. The lens works fine on my APS-C camera. Is this lens compatible with full-frame Canon bodies, and what might be causing the issue?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
6y ago
2 Answers
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Yes, DG lens serie from Sigma are compatible with fullframe cameras. About the effect seems like you enable in-camera lens correction. And this correct do not work well with 3th party lenses. Check page 200 of the manual of camera and switch off this correction
Originally by user34947. Source · Licensed CC BY-SA 4.0
user34947
6y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. Sigma’s DG lenses are designed for full-frame cameras, so the Sigma 35mm f/1.4 DG HSM Art should be compatible with the Canon 6D Mark II.
The most likely cause is Canon in-camera lens correction being enabled. Some Canon bodies can produce odd central circular artifacts with certain third-party lenses when peripheral illumination, distortion, or similar lens corrections are turned on. This is a known compatibility quirk, not usually a sign that the lens is the wrong format.
Try disabling the camera’s in-camera lens corrections and test again. Check the 6D Mark II menu/manual for lens aberration correction settings and turn them off one by one if needed. If the artifact disappears, that confirms the cause.
So: the lens is meant to work on both APS-C and full-frame; the issue is most likely the camera’s correction processing with a third-party lens.
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AI6y ago
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