Best eyepiece holder mechanism. Just slide the eyepieces in and go. No tightening. No slip even when unit is turned upside down. Easiest to adjust for diopter differences.

• 目镜结合机制最合理,只要把目镜简单的塞入拔出即可,不用别的固定措施,就算你把它倒过来拿,目镜也不会掉出来,最容易调整屈光度。