The 4x32 rifle scope offers a relatively wide field of view and outstanding performance in a lightweight package. Like all IOR riflescopes, it is environmentally sealed and will operate in temperatures ranging from -40° to +140° F. Other features include: Photo engraved glass reticle T3 lens coating system, developed by Carl Zeiss, consisting of full multicoating and anti-reflection treatment eliminating glare and maximizing light transmission One piece steel housing, "O" ring sealed and nitrogen filled Finger-adjustable knobs Waterproof - Fogproof - Shockproof Superior optical glass by Schott Glasswerk, Germany