Sigma 300 800mm f56 EX APO DG HSM Canon AF

From 300mm telephoto to 800mm ultra telephoto this lens provides a constant fast maximum aperture and is optimized for digital SLR camerasThis lens covers the telephoto range from 300mm to the ultra telephoto range up to 800mm. By continuously varying the angle of view from 8.2° to 3.1°, the lens takes a lot of the footwork out of picture composition.Lens coating reduces Ghost and FlareThe multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum colour balance.Equipped with ELD Extra Low Dispersion glass elementsTwo ELD glass elements in the front lens elements reduce chromatic aberration to a minimum and also ensure sharp, quality images of high contrast. HSM Hyper Sonic MotorHSM provides silent, high speed and precise auto focusing with full time manual focus override.Drop in filterThe lens features a drop in 46mm filter holder in the rear part of the lens barrel, which can be rotated to facilitate the use of filters.Internal Focusing and Internal ZoomingSince focusing and zooming do not change its overall length, this lens is easy to hold and use. SpecificationLens Construction 18 Elements in 16 GroupsAngle of View 8.2 3.1 degreesNumber of Diaphragm Blades 9Minimum Aperture f32Minimum Focusing Distance 600cmMaximum Magnification 16.9Filter Size 46mm drop in typeDimensions Diameter 156.5mm x Length 544mmWeight 5880g