Excellent lens from Canon. Canon lenses with a red frame give excellent results. This is a great place to buy and Canon backs all of their lenses for warranty and service.

I never had the chance to try the 16-35mm but the 17-40mm is great quality at a reasonable price Prize, some of my best photos taken with this lens. If you like landscape photography, this is your lens.

Good ultra wide angle full frame lens at a very reasonable price. Sure, the 16-35 f4 is better, but it's also heavier and much more expensive. This lens is lightweight, well made and very affordable! The angles aren't perfect, but improve upon stopping.