Detailed Product DescriptionAll lenses and prisms are multilayer_coated for the brightest images; 
High-reflection 
Mirror-coating prism for bright image; 
High_eyepoint design provides a clear field of view, even for eyeglass wearers; 
Close focusing distance: 1.5m 
Waterproof (up to 5m/16.5 ft. For 5 minutes) and fog_free with nitrogen gas; 
Turn-and-slide 
Rubber eye
Cups(Aluminum Alloy Support) facilitate easy positioning of eyes at the correct eyepoint; 
Rubber armouring for shock resistance and a firm, comfortable grip; 
Lightweight body uses fibreglass_reinforced polycarbonate resin 
Wide strap Can be fixed to a tripod using optional tripod adaptor.