25x50 mm binoculars night vision kids toys fully coated 166m1000m
Structuresbinoculars magnification25 objective lens mm50 materialmetal field of view166m1000m exit pupil diameter mm2mm best usehunting magnification20x up exit pupil diameter range mm2 3mm objective diameter40 50mm field of view range150 300ft1000yds optical coatingfully coated brandother forkids toys featuresnight vision