Canon EF 17-40mm f/4L USM lens (full-frame tests)
Written by Gordon Laing
Canon EF 17-40mm video tour
We’re pleased to present a short video tour of the Canon EF 17-40mm lens. There’s no need to download any new software – just press the play button in the middle of the screen below and wait for the video to start; you may need to press the button twice. The quality and any delay before playing may vary depending on your internet connection.