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Sigma Addresses Converter Issue On Sony α9
31 May 2017
Sigma has issued a statement addressing a compatibility issue between the Sony α9 and its MC-11 converter. The statement acknowledges that some of Sigma's zoom lenses "may not focus precisely" on the α9 when using the converter.
Sigma said it was investigating the issue and would report its findings on their site later.
The text of the statement follows:
For customers using SONY α9 (ILCE-9) camera
Thank you for purchasing and using our products.
We have found that the combination of Sigma Mount Converter MC-11 (SA-E and EF-E) and some of Sigma's interchangeable zoom lenses may not focus precisely, if it is attached to SONY a9 (ILCE-9), released by Sony in May in 2017.
When using AF-S mode and shooting in telephoto range, it could occasionally display the shot is in focus, although it may not be spotted properly on the subject.
We are afraid of this inconvenience caused to the customers who use these products.
We are now investigating the phenomenon and will make a further announcement on the Web site shortly.
We appreciate your continued support for our company.
For further information, please contact your nearest authorized Sigma subsidiary/distributor.