I immediately say that we will talk about the Sigma AF 30mm f / 1.4 I compared, like everyone else, with Canon 28 1.8 but how many advantages compared to the native one: aperture, sharpness and much more,
Pros
in fact, guys, them:
1) sharp even at 1.4;
2) excellent color reproduction: saturation, natural shades;
3) design, excellent embly and construction, you hold it in your hands like something really high quality and worthwhile;
4) comfortable and smooth focus ring;
5) hood included and Sigma case;
Cons
there are few of them and they are not significant:
1) on the open chromate is very strong;
2) problems with focus in the back, darkness and when shooting dynamic scenes (therefore, for ease of use 4 out of 5);
3) perhaps, for some, a small cup: beautiful circles only on 1.4-1.6, on the rest itโs just a kind of blur into a โporridgeโ