佳能ef 17-40 f/4 l usm是目前用户保有量非常之大的l级红圈镜头，当年与另一支ef 24-105mm f4 l usm一同被称之为最平民的红圈镜头。而17-40更是覆盖了从超广角到标准视角的焦距范围。即使放到几天来看，也很少有全画幅镜头能够覆盖超广角变焦镜头。而这支镜头的焦距，
has a silent focus motor built into the lens. Canon EF 17-40mm f/4L USM. Canon RF 14-35mm f/4L IS USM. Lenses with built-in focus motor focus faster and more quietly than lenses without a focus motor which rely on the camera's body focus motor. minimum focus distance. The image below was taken, hand-held, in available light, with the EF-M 11-22 at 11mm, the EF 17-40 would not have got the shot in the cramped area inside. Canon EOS M5, 11-22@ 11mm, f/4, 1/500sec, ISO-500. You can even get great close-up images with the 11-22, because of the massive depth of field afforded by the short focal length, as per What is the difference between Canon EF 24-70mm F/2.8L II USM and Canon EF 17-40mm f/4L USM? Find out which is better and their overall performance in the camera lens ranking. 03-30-2022 10:17 AM. "Any lens that says it is compatible with Canon EF mount " Perhaps a bit more simple to understand is the lens will have "EF" or "EF-S" in its name. I.E., EF 17-40mm f/4L USM Lens. Or, EF-S 17-55mm f/2.8 IS USM Lens. BTW, the latter is a far better choice for your T7 and nearly the same price. Canon EF 17-40mm f/4L USM User Reviews. 8.6/10 average of 56 review (s) Build Quality 9.3/10 Image Quality 8.7/10. Write your own review! (9 reviews) Build quality, color and contrast, FF . 319 46 114 176 395 200 323 210 284