Magification:10-20x

Objective diametre:42mm

Eyepiece diameter 20MM

Eye Relief: 12.8mm

Exit Pupil:4.20mm

Field of  degree:5.6°

Coating type: fully-multi coated

Focusing system:Ind.

Near Focus:4m

Waterproof:no           

bk7 prism                         

weight：325g（including mobile phone holder）

Size:78X56X148mm