Canon EF400mm F2.8L IS III USM: B&H Photo / Amazon / Adorama The Canon EF400mm F2.8L IS III USM is being marked as discontinued overseas, but there are a few left in stock in the United States. B&H Photo and Adorama have an unspecified amount left, while Amazon has 3 lenses. If you want this … Continue reading Canon EF400mm F2.8L IS III USM Discontinued