Kowa Prominar ED 88mm Straight Spotting Scope. - By incorporating fluorite crystal lenses, Kowa's 88mm Prominar spotting scope takes image quality to the max . You can enjoy the ultimate viewing experience, with the enhanced resolution, color, and contrast. An 88mm objective lens offers terrific light-gathering power for long distances and low light settings. With the eyepiece locking mechanism, the eyepiece securely attaches to the body and reduces the risk of loss. For rain and temperature fluctuations, the waterproof and fogproof body adds protection.