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Sigma 400mm Lens Goes Haywire.

Started Jun 12, 2021 | Discussions thread
OP Renato1 Veteran Member • Posts: 3,385
Re: Sigma 400mm Lens Goes Haywire.

Thanks Michel,
         I hadn't known that about the higher torque in the A77 - very interesting.
It does seem a tad too coincidental that the lens started not working straight after using it on the A77.
It might be a good idea not to use my my other more expemsive Sigma lenses on the A77.
But I do have some cheap Sigma zooms, which I might try out.
Regards,
Renato

_Michel_ wrote:

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.

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