Enjoy signature carl zeiss performance planar lenses smooth out aberrations and minimise field curvature for flat distortion free pictures across the full frame shoot flash free in low light with a maximum aperture of f14 the lens makes the most of any available light which means you dont have to resort to flash features dont scare the wildlife a super sonic wave motor ssm ensures autofocusing is smooth silent and discreet a real asset if youre shooting in the wild focus with