I want to add a prime lens for my 7D , my choice will be on 50 1.4 canon or sigma , 30 1.4 sigma , 85 1.8 . . I love sigma 50 1.4 body looks gorgeous and well build than canon one . some people get trouble with their sigma like back focus or front focus misfocus things . is that really buying sigma 50% chance to have a good copy ? What do you think guys . . ?

