Overall, not a bad thing can be said about Sigma ‘ s 35mm f1.4 EX. The company surely put a lot of time and effort into the design and it ‘ s worth every penny. The lens is sharp as a razor, a relative speed-demon when it comes to focusing, and has some beautiful image quality.
Cost of Sigma lens vs; cost of Canon, Nikon or Zeiss lens, Great image quality, Optional USB dock to update firmware, Fast autofocus speed
Lack of weather sealing