One of the most important accessories for each lens you own. A lens hood provides multiple functions: it shades the lens from stray light, improving your contrast and image quality; in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles. Almost all EF and TS-E lenses have a Canon lens hood engineered specifically for it.
Reviewed by 1 customers
I bought this to use on the Canon 17-40mm F/4 L instead of the hood supplied with it. While the supplied hood is fine for a full frame camera like the 5D, on the crop sensor 40d (1.6) this is the ticket. It is a little deeper on the sides and proves effective. It is a tight fit at first but has losened up with use and now works very well indead.