Comments about Off Brand Sigma 17-35 2.8/4 Ex "dg" Hsm F/eos:
I've had this lens for 4 years. When I started using a bit more (every day) it just broke.
There was no warning, the diafragm just stopped working at f32.
Before I had noticed that the lens did not focus correctly, especially in low light or when the subject is to the side of the frame.