b200900972140

Detailed Product Description Detailed Product Description:7-21X40 zoom binocular, big eyepieces, wide view angle, fully coated, high resolution MAGNIFICATION: 7-21XOBJECTIVE DIAMETER (mm): 40 LENS COATING: Blue FIELD ANGLE: 5.3°-2.5° FIELD OF VIEW (at 1000m/1000yds): 92m/276ft~43m/192ft PRISM TYPE: BK7 CLOSE FOCUS (m): 10 EXIT PUPIL (mm): 5.7~1.9 RELATIVE BRIGHTNESS (mm): 27.04~2.89 EYE-RELIEF: ...