Sharpest 3rd party E-mount 100-400mm with best AF?

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MarkG Regular Member • Posts: 375
Sharpest 3rd party E-mount 100-400mm with best AF?

Looking for a 3rd party backup to my FE 100-400mm GM and 200-600mm G.

Considering Sigma 100-400mm or Tamron 50-400mm.

Which one is sharper at 400mm with better AF on Sony A1 or A7CII?

Thanks!

PS Well aware that max burst speed is limited to 15 FPS on 3rd party lens.

 MarkG's gear list:MarkG's gear list
Sony a6400 Sony a1 OM-1 Canon EF 100mm f/2.8 Macro USM Sony E 50mm F1.8 OSS +6 more
Sony a1
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