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Magnification

 20~60X

Effective diameter of objective lens

 Ф85mm

Objective lens focal length

 530.04mm

Zoom eyepiece focal length

 26.1mm~8.83mm

Objective lens structure (#Elements/#Groups)

 3/3

Zoom eyepiece lens structure  (#Elements/#Group)

 7/4

Focusing system

 Internal porro prism focusing with dual focusing device

Real field of view

 2°~1°

Apparent field of view

 40°~ 60°

Field of view at 1000m/1000yds

 35m~17.5m/105ft~52.5ft

Eye relief

 19.6mm~17.8mm

Exit pupil

 Ф4.2mm~Ф1.4mm

Twilight factor

 41.2~71.4

Minimum focusing distance

 7m

Zoom eyepiece length

 88mm(Without dust cover)

Zoom eyepiece weight

 220g(Without dust cover)

Main body length

 385mm(Without dust cover)

Main body weight

 1590g(Without dust cover)