Optically the lens has an XA (Extreme Asperical) Element for pin-sharp detail, three ED elements to minimise axial chromatic aberration and Nano AR Coatings to reduce ghosting and flare to a tiny level.

As an upgrade from most other AF lenses, this model has two autofocus  Sensors – the usual rotation sensor with an additional focus lens group position sensor for amazing accuracy so needed with a lens of such high performance. Focusing is achieved quickly and quietly using the SSM motor.

Additional features include a Hood Lock to prevent accidental loss, an AF-MF switch with easy access and focus hold button, a de-click switch for silent aperture adjustment when recording movies

The 85mm GM lens is dust and moisture sealed with an additional lens-body interface seal to give added weather resistance.