Sigma Lens Autofocus Problem in Live View Canon 550D

Started Mar 4, 2011 | Discussions thread
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drjlo
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Sigma Lens Autofocus Problem in Live View Canon 550D
Mar 4, 2011

My Sigma 70mm F2.8 Macro lens gives blurry autofocus results in live view, even after the the focus square turns green, saying it's in focus. AF works fine via viewfinder.

Seems like many Sigma, Tamron, etc lenses have this problem with certain newer canon bodies and Nikon bodies (3100, 7000).

People are saying Sigma needs to release new firmware or rechip my lens. Anybody else having any problems with Sigma lens and Canon body? If so, please email Sigma to urge them to come up with a fix at info@sigmaphoto.com

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