The TSN-554 15-45x55mm Prominar Spotting Scope is a testament to Kowa’s devotion to optical innovation. Unlike many spotting scopes of the same class that use optical glass, the TSN-554 Prominar is equipped with a unique fluorite crystal objective lens. This crystal lens eliminates color blur and vividly enhances resolution and contrast, and the Kowa KR coating protects the lenses from dirt, fingerprints and other debris. In addition to its superior optical performance, the TSN-554 sports a lightweight but incredibly durable construction that is completely waterproof, and a nitrogen filled chassis high performance in the most challenging conditions. Features of the TSN-554 15-45x55mm Prominar Spotting Scope: Fluorite crystal lensesLightweight construction Fully waterproof Nitrogen-filled chassis Kowa Angled Prominar 15-45x55mm Spotting Scope TSN-553