Detailed Product Description Detailed Product Description:10X50 porro binocular, big eyepieces, wide view angle, fully coated, high resolutionMAGNIFICATION: 10XOBJECTIVE DIAMETER (mm): 50 LENS COATING: Blue FIELD ANGLE: 5.7° FIELD OF VIEW (at 1000m/1000yds): 114m/342ft PRISM TYPE: Bk7 CLOSE FOCUS (m): 10 EXIT PUPIL (mm): 5 RELATIVE BRIGHTNESS (mm): 25 EYE-RELIEF: 14.5Other Powers Available:8x40