FEATURES
01
At the front is a high-tech, large-diameter moulded glass aspherical element.
02
The front element nears the forward edge of the built-in hood at shorter focal lengths.
03
Weather-seals are applied to all joints, as well as the mounting plate.
04
The manual focus ring operates with smooth precision, and a focus distance scale is featured.
05
The optical path includes three FLD, three SLD and three aspherical elements.
06
The rotational direction of the zoom ring matches that of Canon lenses.
07
The brass mounting plate is compatible with Sigma’s USB Dock for applying customization and firmware updates.