DESCRIPTION

This Sigma APO 500mm f/4.5 EX is an Apochromatic ultra-telephoto lens with a fast f/4.5 maximum aperture, and it incorporates two Extraordinary Low Dispersion glass elements to reduce chromatic aberration to a minimum. Internal focus enables responsive and fast autofocus speed. A rotatable drop-in filter holder in the rear part of the lens barrel facilitates the use of filters including a polarizing filter.