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The 3XMag magnifying module is specially designed for compatibility with Aimpoint sights and for 

maximum flexibility and increased performance in the field
The 3XMag is a revolutionary tool for military personnel, law enforcement, sport shooters and hunters
Also can be used as a handheld magnifying glass monocular for discrete observation and identification
Magnification: 3X
Objective Diameter: 20mm
FOV: 7-degree
Exit pupil diameter: 7mm
Eye relief at 5-degree FOV: 40~90mm
Eye relief at full FOV: 60~65mm
Diotric adjustment: Fixed-1.0 D
Photopic integral transmission: more than 80%
Spectral transmission: more than 60% (700~100nm)
Resolution: (lp/mrad): more than 12