Sigma Filter Holder with A00531 46mm Normal Rear UV Filter

The Filter Holder with A00531 46mm Normal Rear UV Filter from Sigma is compatible with Sigma's 500mm f/4 DG OS HSM Sports Lens. The Filter holder fits into the rear filter slot of the telephoto lens and locks into place. The included A00531 46mm Normal Rear UV Filter reduces ultraviolet light, which causes a bluish cast in your images. The filter has a filter factor of 1, so there is no increase of exposure.