Sigma mc11, A6600 poor focus

[haddock]

Hello, until I have the funds for a Sony 200/600 I will be using my Sigma 150 /600 on my a6600. At the moment any auto focus I use seems way off . I know an adapter won't be as good as native, but my Sigma works better on my xt3 !, which considering the Sony has better auto focus is a bit worrying. Have any other Sony users found this?. Any thoughts tips etc would be gratefully accepted, thanks, Andy.

 

[nandbytes]

Sony does have better AF but that's when using native lenses.
Adapted sigma lenses especially telephotos aren't great. You'll get slightly better performance with metabones adapter and even better performance with LA-EA3 with A-mount lenses (but only tamron version of 150-600mm available on A-mount).

 

[footman]

Have you calibrated the lens with the Sigma dock, it’s not always necessary but it helped me when I used one? Also check that the lens has the latest firmware.

 

[mav]

i used one for a while withan a6400 and it was quite usable had no problems with af accuracy have you updated the dock to the latest firmware. you shouldnt have to calibrate the lens with a mirrorless camera but has the lens been calibrated previously by the dock to a other body

 

[haddock]

Thanks everybody, I did do an update on the lens and adapter it does seem better and will get me through until I get the 200/600. Andy.