A very good lens, I recommend it to everyone who needs a focal length of 35. Except for those who like to focus manually and who need a lens for use in difficult field conditions. In general, the first sigma that you want to buy not only because of the price. Its pros: Very sharp, almost no distortion, autofocus is fast, quiet and accurate, good workmanship, nice (for sigma) design, excellent value for money. Has cons: Non-informative focusing ring - the move is tight and twitchy, dust and moisture protection is not declared.