Canon EF 400mm f/4 DO IS USM Lens

The EF 400mm f/4 DO IS USM is the worlds first super telephoto lens incorporating "Multi-Layer Diffractive Optical (DO) Element", for camera lenses, and is considered a major breakthrough. The outstanding feature, being its superb ability to correct chromatic aberrations.

An entirely new optical technology for SLR camera lenses, Multi-Layer Diffractive Optics makes possible a 400mm super-telephoto lens that’s about one-third 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. Combining portability and easy handling, Image Stabilizer weather-resistant construction, superb optics and incredible AF performance, the 400mm DO IS lens is ideal for photographers who want super-telephoto power along with good lens speed in a handholdable package.

• The world's first multi-layer DO element for telephoto lens
• Small and light
• High image quality
• Image Stabilization for equivalent effect of a shutter speed of two stops faster
• Highly resistant against dust and moisture