Canon EF 400mm f/4 DO IS USM Telephoto Lens

An entirely new optical technology for SLR camera lenses, Multi-Layer Diffractive Optics, makes possible a 400mm super-telephoto lens that’s about 1/3rd shorter and significantly lighter. Diffractive Optics don't end there--combined with a small Fluorite element, they permit almost total elimination of chromatic aberrations, and at the same time are able to combat spherical aberrations.

The advantage that no other lens can compete with is, that the 400mm f/4 Do can be carried for miles without undue effort, be handheld for considerable periods of time, as in waiting a few minutes for some wildlife to move into position, or sports action to happen. (The 400 DO weighs 4.3 lbs vs 10.2 lbs for the 400 f/2.8)

Canon's breakthrough multi-layer diffractive optical lens technology provides photographers with superior super-telephoto performance in a smaller and lighter design with enhanced correction for chromatic aberrations. Canon also added their highly effective Image Stabilization system that gives the equivalent effect of a shutter speed two stops faster. And, it's built it to Canon's professional standards with fast AF, full-time mechanical focus and dust and water-resistant construction. DO lenses have a diffraction element that compensates for the color dispersion of spherical lens elements. It also reduces optical complexity and size

Super Telephoto Lens
High Power telephoto lenses from 400 mm to 800 mm (APS-C 300 mm 500 mm) and longer are very expensive, even for the slower versions, but they provide the ultimate in telephoto photography. Deep pockets are needed for most lenses in this range, particularly the faster versions, as one lens can cost more than the average person may spend on photography in their life. A super-telephoto lens can reveal far-off objects barely visible to the human eye.
A professional-quality 400 mm ƒ/2.8 lens is the ultimate dream lens of many sports and wildlife photographers, which they may save for years to acquire. A 600 mm ƒ/4 lens is even more striking, but the 16-times magnification of an 800 mm ƒ/5.6 lens can also be used for astrophotography with clear, vivid results.

Professional photographers are the primary consumers of such magnificent lenses. A majority of the images we see in publications are shot with these lenses.

4x Zoom Lens variably extends from 100mm to 400mm focal length / For use with Canon 35mm SLR Cameras / EF-Mount / USA

• Case
• Hood
• Tripod Collar
• 52mm gel holder