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There are a lot of reviews that say their lens will not focus with this converter. You need be take into account that it will reduce the light reaching your camera sensor by 1 stop. For a lens with a maximum aperture of f6.3, this means that your *real* aperture is going to be f9.0 with this converter fitted. Even top end cameras may struggle to auto focus at this aperture in with some subjects in some conditions. It auto-focuses with my Sigma 150-600 on a Canon 7DII but not all the time. Bear this in mind before ordering..
Verified purchase: Yes | Condition: Pre-owned
Use on a Sigma 180mm f3.5 APO DG Macro Sony Mount it work great AF work just fine
Verified purchase: Yes | Condition: Pre-owned
If you are thinking of using this product on the Sigma 150/500 zoom lens DON'T it does NOT give all the fuctions of the actual lens. It does not auto focus or auto anything else, thoes fuctions have to be made manualy. It renders a resonable image IF used on a tripod as the optical stablizer fuction does not work well if at all when attached to the above lens.