Burris Titanium riflescopes start with optical glass that is ultra-pure, ground and polished to exacting dimensions and consistency. Each lens surface is multi-chemical multicoated for maximum light transmission. The large 50mm clear objective transmits more light than your eye can use, complemented by the oversize 30mm internal lenses to assure transmission of all that light back to your eye. The resulting resolution, brightness, and clarity are astounding. The T-Plated Lenses on the Burris Titanium scope do not require a "soft clean lens cloth." Ordinary dirt, dust, and grit won't bother them a bit. Not only is T-Plate durable, but it is ultra-smooth also, which facilitates water beading and sheeting. Beyond the whole scope tube and eyepiece being made of solid titanium, each scope is coated with aluminum titanium nitride. This nitride is molecularly bonded to the titanium through high intensity physical vapor deposition for maximum adhesion that will not blister, flake, or chip. The result is an ultra-hard corrosion proof surface. Includes the incomparable Burris Forever Warranty.