DP Review -
30 May 2017 20:48

Sigma has warnedthat the use of its Mount Converter MC-11 and certain Sigma zoom lenses with the Sony a9 may result in missed focus.According to a notice recently published by Sigma, the issue may arise 'occasionally' when using AF-S mode and while shooting 'in the telephoto range.' The phenomenon, according to Sigma, affects both the EF-E and SA-E versions of the MC-11. The company says it is investigating the issue and that it will publish an update 'shortly,' presumably with a software fix in...
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