... silver,elegant, exquisite, High-quality optical lens WIDE ANGLE, FIELD OF VIEW 140M/1000M WIDE ANGLE, Lightweight and compact, these opera ... : Fujian ChinaBrand name:BINOVISION or “OEM”Magnification: 3xObjective lens Diameter(mm): 27Angle of view:7.6 Field of ... 5mmExit pupil:3.2mmResolution: 5Relative Brightness;10.02Eye Relief :8m10. lens: fully coated11. material: metal ,plated in gold or silver ...