Gomu 13x50 mm monocular range finder high definition waterproof fogproof carrying case porro prism wide angle spotting scope night vision
Structuresrange finder monocular eye relief mm185mm magnification13 objective lens mm50 field range 65 typerange finder dimlight zoom binoculars materialmetal plastic eye lensmm22 lens diametercm20 30mm batteryna prism typebak4 field of view114m1000m exit pupil diameter mm4mm magnification10x to 149x eye relief range mm15 20mm exit pupil diameter range mm4 5mm objective diameter40 50mm field of view range100 120ft1000yds optical system