Ningbo Barride Optics Co., Ltd.  

Product Name: 25X100 Outdoor Long Distance Big Telescope Binoculars (BM-9029) Model NO.: BM-9029 Focusing Type: Center Focusing Objective Aperture: >50mm Lens: Glass Lens Type: Prime Lens Usage: Gift, Bird Watching/Hunting, Travel Function: Observation Magnification: 25X Type: Binocular Objective Diameter(mm): 100mm Prism(Bak4/Bk7): Bak4 Lens Coating: Fmc Trademark: OEM Transport Package: Standard Box Specification: 1 Origin: China Product Description 25X100 outdoor long distance big telescope binoculars(BM-9029)Magnification25Objective diameter(mm)100mmPrism TypePorro/BAK4Number of Lens7pcs/5groupsLens CoatingFMCAngle of View2.5°Field of View43m/1000m,131ft/1000ydsExit Pupil Diameter(mm)4mmEye Relief(mm)17.34mmRelative Brightness16Twilight Index250Interpupillary Distance54mm-73mmResolution≤2.5"Near Focus30mall weatherYesshockproof and waterpoofYesNitrogen filledYesEyecup systemfold down