The Canon EF 100-400 mm 1: 4.5 5,6L IS USM super telephoto of L-series with image stabilizer. Fluorite - and Super-UD glass lenses make for a far-reaching elimination of secondary spectrum. An automatic compensation of the correction leads to consistently high image quality at all focal lengths. Is 1,4fach compatible with the Extenders and duplicate the image stabilizer has two modes of operation The zoom lens is my constant companion and me delivers sharp images of excellent quality. Canon "L" lens is it dust - and splash-water protected sealed. The delivery includes a lens hood and a lens holder, 77 mm filter diameter.