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Sigma 50mm f/1.4 EX DG HSM is slightly better in term of "bokeh", it has aspherical element where Nikkor 50mm f/1.4G doesn't has...
in comparison for picture quality, there are really quite the same (really good)...
aspherical element help to reduce distortion and improve the sharpness at the image borders...
this distortion is also known as chromatic aberration (CA) or colour fringing...
Sigma len is bigger and heavier than Nikkor.
As silverxu and yellowS15 said, make sure to buy the len from reputable shop so you can change it if it has front/back focusing problem... |
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