Anyone looking for equipment of proven quality right from the start will be delighted by the spotting scopes in the ATS/STS range. They offer all the features that you would look for in a spotting scope, including a large field of view for rapid target acquisition and tried-and-tested optics. With its angled view the ATS 80 enables comfortable observation for hours. The 80 mm objective lens diameter provides higher detail recognition, while a wider exit pupil ensures brighter images and comfortable viewing even in poor lighting conditions. Diopter correction at 8 (dpt): >5 Objective filter thread: M 82 x 0.75 Submersion tightness: 13 ft (4m) water depth (inert gas filling) Field of view: 2.1-1.1 deg Field of view. Apparent: 40-65 deg Light transmission (%) total product: 86% Focal Length with TLS APO: 600-1800mm