Features：
UWA 82 ° wide-angle series. 1.25 inch/317mm interface, a group of three focal lengths 4mm, 7mm, 16mm
4 groups of 7 optical lenses, all coated with multilayer green film, super wide angle, flat field, apochromatic optical design·
Metal frame, foldable eye mask, long pupil, suitable for observation of many people
1.25 inch filter fitting screw is reserved in the bottom of the steel sleeve
