Review on Ultra Wide Angle Zoom Lens for SLR Cameras - Canon EF 17-40mm f/4L USM by Arina Foliez ᠌

Dust does not suck in, the range of focal lengths is great for any matrix: crop 1.6: 27.2-64 is almost a regular lens, 1.3: 22.1-52 wide with the ability to take a portrait, Well, on 5d m2 there is nothing to say . Excellent hood included, waterproof design. It is my deep conviction that a series of optics with a relative aperture of 4 does not lose more aperture with 2,8; it has a different purpose . it is for maximum mobility . well, consider in comparison 70-200 / 2.8 and 300 / 2.8 on the one hand and 70-200/4 and 300/4 on the other. You will understand everything yourself.