1.  Zoom : 5—45X(90X)

2.  Working distance: 99mm

3.  The range for adjusting the visual distance: 55—75mm

4.  The range for adjusting the diopter: ±5

5.  The range for adjusting the focus: 135mm

6.  Wide-angle eyepieces with high point

7.  Optic head and stand tilt to a more natural 40° viewing angle

8.  Three kinds of illumination fields

9.  Tungsten-halogen dark field/bridge field illumination with sliding baffle

10. Rheostat to vary dark field/bright field intensity

11. Adjustable iris diaphragm to control width of light beam

12. Fluorescent illumination simulates north daylight, ideal for diamond color grading

13. Working normally in 90—230V voltage range and the luminance is steady

14. Built-in optical-fiber illumination