Product features：

The optical amplification system of 5-20 times infinite continuous variation;

0 ° to 90 ° Angle adjustable double eyepiece barrel;

Nonextreme continuous brightness adjustment；

Fast switching between two groups of lighting sources.

Lighting system：

Cold light source coaxial lighting；

Dual light source 15V/150W German osram halogen lamp.  

Mechanical parts：

The maximum stretch length of the transverse arm is 1075mm, and the range is 200mm.