Canon EF 500mm f/4L IS I USM Lens

CANON EF 500MM F/4L IS USM LENS Weather-resistant construction, excellent durability, superb AF speed and optical quality combine with Canon's Image Stabilization for incredible imaging potential. This lens weighs 8.53 lb (3.87 kg) so a tripod or monopod is a required accessory. A tripod collar is built into the body of the lens. Fluorite & UD elements eliminate secondary spectrum chromatic aberration Full-time manual focus override AF Stop function shuts off autofocus when an obstruction appears Dust & moisture resistance made exceptional by magnesium alloy lens barrel and new rear gasket at lens mount Two-stage image stabilization; dual-axis camera shake correction or vertical axis only (for panning) 3-stage focus limiter Focus preset function allows for returning to a specifically set focus by turning a ring in front of the focus ring.