Advanced technology creates maximum clarity for a truer look at the natural world. Endeavor has an advanced optical system combined with outstanding lens coatings, creating superior light-gathering abilities. This results in significantly brighter, more vivid, crisper images than standard optics. An exclusive anti-reflection coating minimizes light reflection, providing incredibly impressive, lifelike images. Endeavor is waterproof, fogproof and keeps up its great performance even under challenging conditions. Its solidly-constructed body is protected by rubber armor for the durability you need while maintaining a surprisingly low, balanced weight. A large, ribbed center focus adjustment wheel, easy-to-adjust click diopter ring and 3-stage locking eyecups make adjustment hassle-free, with or without gloves. Endeavor also provides long eye relief.