PROMINAR XD Optics: Fluorite Crystal in a 22mm Objective
At the core of the Genesis 10x22 are Kowa's XD objective lenses: high resolution ED glass containing large amounts of fluorite crystal, which Kowa describes as giving high light transmission. Glass of this kind reduces chromatic aberration, or false color fringing, and Kowa says the result is pin sharp images with natural color, high contrast and fine detail.
Kowa's lens coatings further enhance the light transmission of all lenses, and Kowa says the Genesis prism system gives a wide field of view and edge to edge sharpness with minimal loss of light, even in low light conditions.