The 40mm low power Omni eyepiece is a 4 -element premium symmetrical Pl�ssl
optical design. Features include blackened lens edges to minimize internal
reflection and maximize contrast, multi-layer coating group on
each lens surface to maximize light transmission and contrast, and each Omni
goes through a two-step anodizing process to prevent reflection from the top
eyepiece barrel, unlike most other manufactures who use reflective surfaces.