i have a 17-85mm , only problem is …there is an internal screw loose which means it cant rotate to change focal length , its stuck at 17 ( a very common problem with the 17-85, when repairing they recommend using nail varnish on the screw to prevent it happening again !!). “apparently” this can be fixed at home following some quite detailed instructions. the other option is to bring it in and get it fixed. if you wanted to look at how much it would be to repair , i’d happily sell the lens for e160 inc p+p , it has a genuine canon hood as well which was e30!! . i’ve no need for it , i have the 15-85.