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EF 400mm f / 4 DO IS USM Optical benefiting from diffractive optics technology third generation - Canon
Weighing in at only 2,100 g, the EF 400mm f / 4 DO IS USM II is smaller and lighter than a goal 400mm f / 4 to conventional design. The new lens benefits from the diffractive optical third generation technology. Canon was the first company worldwide to successfully commercialize this technology by developing its own unique structure. With diffractive optical elements, the EF 400mm f / 4 DO IS USM II is 26% smaller and 30% lighter while providing excellent optical performance. This excellent image quality in a more compact format is especially suited for sports photography, wildlife and current. The goal is resistant to flare and moiré and offers exceptional clarity. Its tight structure protects the lens from dust and moisture. The front lens is itself covered with fluorine stain to repel water and dirt.
|Lens Mount||Canon EF|