HD DA TC x1,4: no Sigma HSM; not making FF compatible

Started Mar 10, 2014 | Discussions thread
SungiBr
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Re: HD DA TC x1,4: no Sigma HSM; not making FF compatible
In reply to beholder3, Mar 10, 2014

beholder3 wrote:

Sigma 180 Macro and 105 Macro seem to be doing fine. Looks like screw-driven lenses are fine and only HSMs dont work. On the latter not only FNumbers but also focal lengths are not converted. Seems a Sigma issue.

I remember that newer nikons can't properly focus with some sigma lenses to. That was caused by the reverse engineering sigma employs on their lenses, and was adressed with firmware updates for some of their lenses so they can work on nikon bodies.

Still, Ricoh/Pentax didn't state their TC is compatible with third party lenses

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