Bigma won't focus with my a7iii

Started 2 months ago | Questions thread
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Karl Scharf
Karl Scharf Veteran Member • Posts: 4,070
Bigma won't focus with my a7iii

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?

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...."Sony, your crap is so good" this quote!

 Karl Scharf's gear list:Karl Scharf's gear list
Sony a7 III Sigma 24-70mm F2.8 EX DG HSM Sigma 105mm F2.8 EX DG OS HSM Tamron 28-300mm F3.5-6.3 Di VC PZD Tamron 17-28mm F2.8 Di III RXD +14 more
Sigma 50-500mm F4.5-6.3 DG OS HSM
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