Sigma is Working on MC-11 Mount Adapter Focus Issue on Sony a9

sigma mc-11 mount converter

Sigma recently announced that the use of its Mount Converter MC-11 and certain Sigma zoom lenses with the Sony Alpha a9 (Amazon/B&H Photo/Adorama) may result in missed focus. According to Sigma USA, the issue may arise ‘occasionally’ when using AF-S mode and while shooting ‘in the telephoto range.’

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Video: Sony a9 High ISO AF Test w/ Canon Lenses Using Sigma MC-11 Adapter

Currently, there are already a lot of tests and reviews of new announced Sony Alpha a9 (Amazon/B&H Photo/Adorama) full frame mirrorless camera. Here is another great video test by Jason Lanier on Sony a9 with Canon lenses using Sigma MC-11 as lens adapter.

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