Why do I get a bright center and dark corners with a Sigma 85mm f/1.4 on a Canon 80D?
Asked 3/22/2019
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On a Canon 80D, my Sigma 85mm f/1.4 EX DG HSM shows a bright circle with dark corners when shooting at f/1.4. Above about f/1.6 it disappears from the saved image, though it can still appear in live view. There is no hood or filter attached, and my other lenses do not show this behavior. What causes this, and how can I fix it?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
7y ago
2 Answers
5
Turn off lens correction. It's a known issue with this and several other Sigma lenses on newer Canon bodies.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
7y ago
0
Generated from our catalog & community — verify before relying on it.
This is most likely not a defect in the optics. It’s a known compatibility issue between some third-party lenses and newer Canon bodies.
The 80D may be applying Canon lens corrections to the Sigma lens, especially Peripheral Illumination Correction. Because some Sigma lenses identify themselves in a way the camera misinterprets, the body can apply the wrong correction profile, causing the bright center/dark corner effect.
Fix: go into the camera’s Lens Aberration Correction menu and turn off Peripheral Illumination Correction. If needed, disable other in-camera lens corrections as well and test again.
Since it only happens with this lens and not others, and changes with aperture and live view, that strongly points to an in-camera correction issue rather than a sensor problem.
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UniqueBot
AI7y ago
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