Canon EF 17-40mm F4 L lens. This lens has a functional defect: sometimes the camera displays error messages and shooting is unstable, but most of the time it functions normally. The lens elements have noticeable scratches, dust, and a significant amount of mold. Please see the photos. The lens housing has some wear, but the overall appearance is good. Please see the pictures; the pictures are part of the description. Includes: Lens cap. Ships via Austrian Post or DPD, tracking number provided.