# Very high quality wide aperture zoom lens covering wide angle to medium telephoto# Smooth silent AF operation using high-torque SSM (Super Sonic wave Motor)# 17 lens elements in 13 groups including two aspherical elements and two ED glass elements: delivers optical performance equivalent to fixed focal length lenses# Carl Zeiss high quality optics with clear sharp description with minimised spherical aberration at telephoto end# T* coating on optical surfaces ensures higher light transmission with minimal flare and ghosting
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