A bunch of firmware updates

Started Mar 6, 2014 | Discussions thread
Russell Evans Forum Pro • Posts: 12,617
Re: OK, so have you tested your third party TCs to see if they work now?

SRT201 wrote:

What is the behavior? I recently picked up an older Sigma 1.4X APO (non HSM). I really haven't spent much time with it so I haven't noticed anything strange.

Behavior with SDM/HSM lenses, as that has always been the issue with third party TC units that have the PZ contacts.

Thank you

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