Many people are not quite sure how to adjust, zero, and use a newly purchased scope. Experienced users may find it easier, but for beginners,

Optical telescopic sights are divided into two types: daylight scopes and night-vision sights. Daylight scopes are generally divided into three categories:　　The first category is the Keplerian telescopic sight.

A scope is a precision instrument. Most users will carefully examine it from all directions when they first receive it, and will turn almost every button.