Review on Ultra Wide Angle Zoom Lens for SLR Cameras - Canon EF 17-40mm f/4L USM by Avut Prapratchob ᠌
It's the best purchase I ever made, I will definitely do it again.
Great choice for travel and scenery. Shooting from a tripod (night or interior) is also his hobby. Filters for it should be slim/wideangle/or something like that. With conventional filters at wide angle vignettes. Used only on full frame. For owners of cropped cameras, I recommend paying attention to the Canon EF-S 17-55mm f / 2.8 IS USM Pros: Price. Lightweight and compact (very convenient when traveling). Beautiful colors (a plus for landscapes). Virtually no distortion (no distortion, like a fish eye). Fast and accurate focusing. The kit includes a huge lens hood (however, the lens does not catch hares without it, so its main purpose is "to make it look cooler") Many will be pleased with the red stripe :) Has some cons Dark, indoors - flash and high ISOs are this glass's best friends. At a wide angle, problems with chromaticity (we cover the aperture and the problem is solved) There is no sharpness at the long end and along the edges (it is solved similarly)
