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Sigma 400mm Lens Goes Haywire.

Started Jun 12, 2021 | Discussions thread
_Michel_ Veteran Member • Posts: 5,027
Re: Sigma 400mm Lens Goes Haywire.

I have read in the past (when  the A77 came on the market) that problems could occur due to the powerful torque of this camera. It could broke the tooth of the plastic gear when the focus ring hit a stop (min or max distance).

I don't know if your 400 mm has plastic gear but since it does not work anymore with your 5D if I understood correctly, the worst case is possible unfortunately .

Hoping I'm wrong, Michel.

 _Michel_'s gear list:_Michel_'s gear list
Panasonic Lumix DMC-ZS40 (TZ60) Nikon Coolpix P900 Konica Minolta Maxxum 7D Sony SLT-A68
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