Just curious... DX lens + TC on FX body

Started May 12, 2012 | Discussions thread
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Just curious... DX lens + TC on FX body
May 12, 2012

Hi everyone,

I don't know if this is an old topic but I couldn't find something usefull to answer my question. I know that Nikon's TeleConverter don't fit most DX lenses for physical issues (I was able to find a discussion about that on web), but what about a Sigma TC with an Sigma DX lens (crop, whatever) on a FX body (fullframe, whatever)?

(I know that kenko's TC do that fine, but I'm not sure about autofocus availability, and sigma has that information on the website)

let's say a sigma 50-150mm f/2.8 with a sigma 1.4x TC... if I put it on a fullframe body I'll get something about 70-200mm f/4 (without vignetting)?

Please, don't ask me why would I want to do that... i'm curious, haven't found answer on web and no resources to test it myself.

If someone knows about it, or can test it himself, please share

Thanks already

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