Introduction Introduced in 2003 the EF 17-40 f/4L USM was one of the first of the lightweight pro-level L-series zooms from the firm adopting a constant f4 aperture. Not only does that make the lens relatively small and more portable compared with the f2.8 varients, but it also helps keep it moderately priced. This full-frame lens is also popular with users when mounted on APS-C cameras where it’s the equivalent to a 27-64mm. Like other L-series lenses from the company, the EF 17-40mm f/4L has a high grade optical construction consisting of three aspherical lens elements
We use cookies and similar technologies to recognize your repeat visits and preferences, and analyze traffic. To learn more about cookies, including how to disable them, view our Cookie Policy. By clicking "I Accept" on this banner or using our site, you consent to the use of cookies unless you have disabled them.I AcceptDeclineClose
English
中文
Français
