Optical System: Infinite optical system
Extra Wide Field Eyepiece: EW10X/20 eyepiece with scale of cross hairEW10X/22
Infinite LWD Plan Achromatic Objective: 5X/0.12/∞/-(BF/DF) LWD 10mm; 10X/0.25/∞/-(BF/DF) LWD 10mm ; 20X/0.4/∞/0(BF/DF) LWD 5mm; 50X/0.75/∞/0(BF/DF) LWD 1.3mm; 100X/0.9/∞/0(BF/DF) LWD 0.7mm
View Head: Siedentopf binocular viewing head, incline at 30°, Interpupillary 48mm~75mm