Negative Positive
Title: Stopped down it matches the 16-35.
Review: The EF 17-40 will not give you f/2.8, and at f/4 it is not the sharpest. Even so, with a tripod at f/5.6 to f/8 and beyond it is a match for the EF 16-35. Therefore, although as a walk-around lens it cannot compare to the more expensive lenses, if you want to do landscapes, it is by far the best buy in the wide angle L series of Canon--and it will not be bested by the EF 16-35 at the apertures where it is most likely to be used for landscape photography. Combined with its light weight, it is ideal for packing into the mountains or other back country.I would like to give it five stars, but its limitations at f/4 would make that less than honest.
Is the review positive or negative? 