Canon EF 17-40mm F4 L USM lens. Zoom function is perfect; both autofocus and manual focus work perfectly; autofocus is fast and accurate. The front element has noticeable scratches and some mold inside, but almost no dust. Please see detailed close-up images. Photo testing shows that photos taken with this lens remain very sharp and color-accurate. The lens shows minor signs of use, but the overall appearance is good. Please see the images; they are part of the description. Includes: Lens cap, Ships via Austrian Post or DPD, tracking number provided.