PLASTIC BODY & LARGE-FOCUS WHEEL; SEMI-MULTI-COATED OPTICAL SYSTEM ; NITROGEN-CHARGED & O-RING SEALED; TWIST-OUT EYECUPS ; RUBBER ARMOR PROVIDES IMPACT RESISTANCE; 100% FOG- & WATER-PROOF; BAK-4 ROOF PRISM; 10 POWER; 5.2º ANGLE; 50MM OBJECTIVE; FIELD OF