1.Magnification:8X
2.Objective diameter:40mm
3.Prism:BK7 Porro
4.Exit pupil diameter:7mm
5.Eye relief(mm):17mm
6.Angle of view:7°
7.Relative Brightness Index (RBI):49
8.Focus type:Center
9.Minimum Focus Distance(M):5M
10.Shockproof(Y/N)
11.Twilight number:18
12.Net weight(g):688g