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.’ Currently, Sigma is working on this issue, and Sigma […]
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via Sigma is Working on MC-11 Mount Adapter Focus Issue on Sony a9
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