Using the new generation of optical system and using screw to focus makes focus convenient and accurate
 
Improving the electrical contorl mode makes the visual target switching speed have further improved at the same time accurately and no more tremble
 
Using the new generation of optical system to solve the problem of fogging and dust accumulation in long time working condition
 
A new desgin of the midren fashinable appearance new and fresh feeling
 
With the support of data transmission imprive the optometry efficiency