Canon EF 17-40mm / EF 50mm Features. 50mm F1.4 Lens - Two high-refraction lens elements and new Gaussian optics eliminate astigmatism and suppress astigmatic difference. Crisp images with little flare are obtained even at the maximum aperture. Buy: Canon Advanced 2 Lens Kit Lens. Color: Black, Compatibility: Canon 1DS Mark II, Canon 1DX, Canon Best Buy has honest and unbiased customer reviews for Canon - EF 17-40mm f/4L USM Ultra-Wide Zoom Lens - Black. Read helpful reviews from our customers. The EF17-40mm f/4L USM is a lightweight ultra wide angle Canon EF zoom lens. Ultra wide lens for analogue EOS SLR camerasThe EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional and high amateur SLR EOS camera users. Compare Canon EF 17-40mm f 4L USM Lens vs Canon RF 24-105mm f 4 L IS USM Lens vs Canon EF 50mm f 1.4 USM Lens vs Canon EF-M 15-45mm f 3.5-6.3 IS STM Lens Graphite Press ‎ ↵ Enter ‎ for Accessibility for blind people who use screen readers The first clue to a newly-announced Canon lens' image quality is usually the theoretical MTF charts provided along with the press release. Below is a comparison that includes MTF charts for the EF 16-35mm f/4L IS USM Lens, Canon EF 16-35mm f/2.8L II USM Lens, Canon EF 17-40mm f/4L USM Lens and the Canon EF 14mm f/2.8L II USM Lens. I just bought a new 17-40mm f/4 L. I thought Canon's L lenses are dust and drip-proof. However, to my disappointment the instruction manual says (in page ENG-1): "Since the front element of this lens moves when focusing (zooming), you need to attach a Canon PROTECT filter sold separately for adequate dust- and water-resistant performance. Canon EF 17-40mm f/4L USM on Canon EOS 5D Mark II vs Canon EF 17-40mm f/4L USM on Canon EOS 5D Mark III COMPARISON SELECTION (3 selected items max.) VIEW COMPARISON ADD MORE The Canon EF 17-40mm f/4 USM L, released in may 2003, is the latest of Canon's full frame ultra-wide zoom lenses. On APS-C DSLRs its field of view resembles a classic ~27-64mm standard zoom on full frame cameras so it is well suited for both formats but with different scopes. Thanks to its relatively affordable price combined with the promising .

canon ef 17 40mm f 4l review