The Kowa Prominar Pure FL TSN-99A Angled Spotting Scope with TE-11WZ II 30-70x zoom eyepiece is a spotter for those who arrive early and leave late. A large 99mm pure fluorite crystal objective lens paired with Kowa's XD concave lens produces superior lowlight performance and exquisite detail. This special combination combined with improved optical coatings virtually eliminates chromatic aberration even at high magnification. This means you get less distortion between colors for a crisper image because the lens is focusing the color to the same spot in the lens. With the flawless operation, the dual focus mechanism is the gateway to controlling the image between your eye and the spotter. The quick focus knob allows for fast action to bring your subject into detail with a few smooth revolutions, the fine focus knob gives you pin-point, finger-tip control offering the ultimate in focusing accuracy. The Prominar Pure FL TSN-99A utilizes a 100% magnesium alloy body resulting in one of the most compact and lightweight large objective spotting scopes in its class. A fully waterproof and nitrogen-sealed shell plus Kowa KR coating on the optics makes the scope extremely durable for the harshest conditions. The TSN-99 PROMINAR is 100% compatible with the KOWA SYSTEM accessory range giving you access to interchangeable eyepieces, accessories, and digiscoping adapters for DSLR cameras and smartphones.