Sigma 50mm F1.4 DG HSM Art Lens for Canon Cameras
Sigma has been making third party lenses for all the major camera manufacturers for decades, with mixed results. To wit, historically speaking, if you could not afford a first party offering, Sigma tended to be a perfectly workable compromise. That has all changed now.
Starting around the release of the 50mm f1.4 EX DG HSM lens, and roughly during the transition from Sigma's unique "crinkle finish" lens finish to the smoother, rubberized coating, Sigma really upped their game. The lens was sharper than the Canon or Nikon equivalent, if slightly more expensive, and a very robust build. Canon and Nikon's 50mm f1.4, at this point, were and still are in need of a refresh. This allowed Sigma to swoop in and claim a much larger share of the 50mm f1.4 market than before. The result is the lens sold like hotcakes.
With the photography community now primed (pardon the pun) to accept Sigma as a viable critical situation option for professionals, they released the much heralded Art line. The Art lenses are professional-level, well-built lenses that feature all of Sigma's msot valuable technologies: HyperSonic Motor autofocus, multiple aspherical, and low dispersion elements, Super Multi-layer coatings, large front elements to nearly eradicate chromatic aberration, and Sigma's new USB dock for fine-tuning the lenses focus. Suffice it to say, the Art lenses are every bit as top-of-the-line as you'd expect from Canon and Nikon's pro-level lenses.
The Sigma 50mm f1.4 DG HSM Art is a refresh of earlier, popular EX lenses, done with all the accouterments of the the Art line. Where the EX was sharp, this Art version is SHARP. It's retina-slicing sharp. The all-time sharpness leader for 50mm lenses is the Zeiss 55mm Otus, and the Sigma 50mm f1.4 DG HSM Art offers 99 percent of the Otus's performance at less than a quarter of the price! And the Otus doesn't even have autofocus!
If you want a prime that delivers unmatched image quality in an autofocus body, the Sigma 50mm f1.4 DG HSM has no peer and is considered the standard for sharpness among all Canon, Nikon, and Sony lenses.