Than most likely something was wrong with your 50g.copy variation. my sigma 50 was incredibly sharper than my nikon 50g.
I realize that, the focal length has nothing to do with why I chose the Sigma over the Nikkor, nor why I like it better. Both lenses will have the same focal length obviously on my D90, DX, I was simply stating that I never liked the 50mm focal length on a DX camera, but once I starting shooting with the Sigma, I was willing to look past that since I liked everything else about the lens so much...The review we're talking about here is about the performance on FX. A dedicated DX review will follow, soon.
-- Nikon lens reviews, photozone.de
i agree, the 50g was much softer than i expected. the AF was fine, so the softness had to come from some slop in the alignment of the elements. it's probably the only lens i had that did not agree with your findings/results. every other lens i've owned/used has had very similar results to your posted findings. thanks markus!Than most likely something was wrong with your 50g.
I think you measured resolution, not sharpness per se. The Sigma looked much sharper to me wide open, but that could be because it has more contrast.Than most likely something was wrong with your 50g.
Note that we tested to different copies of the Sigma, one on Canon and one on Nikon. Both showed nearly identical performance.