Sigma SA lenses on A7/R through adapter

Started 9 months ago | Questions thread
Scott Greiff
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Re: Sigma SA lenses on A7/R through adapter
In reply to Mike Stratil, 9 months ago

Mike Stratil wrote:

On Ebay I notice that Sigma SA to NEX adapters exist. I wonder how these adapters would work on my A7R. Given that Sigma SA is a crop format (relative to full frame), I assume that using such lenses as the Sigma 35mm 1.4 with such an adapter would result in vignetting.

Has anyone tried this combination? If so, what were your results?

I have one of these and it seems to work fine with my Sigma 70mm 2.8, for instance.  The biggest problem is going to be aperture control.  The adapter I have is dumb and doesn't provide any hook to adjust the aperture, so you're stuck wide-open unless the lens has an aperture ring.  Most recent Sigmas do not.

_Scott

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