Bigma won't focus with my a7iii

Started 3 months ago | Questions thread
Ha Pham Regular Member • Posts: 270
Re: Bigma won't focus with my a7iii

Karl Scharf wrote:

Just received an a7iii, my first FF digital camera, very impressive. Love it so far.

Was hoping I could use my Sigma 50-500mm DG OS HSM lens with this camera, but it will not hold focus. I have tried all possible settings with no luck. Just keeps hunting in AF.

This lens auto focuses perfectly with my a77ii even with a 1.4x teleconverter!

My 24-70mmm and 105mm macro Sigma A-mount lenses also auto focus very nicely and quickly with the a7iii.

Any advice or possible workarounds?

Hi Karl,

I used the older A-mount Sigma 50-500 lens (no OS) + LA-EA4 with my Sony A7r and A7iii with no problem in auto focus.


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