Professional Binocular Stereo Microscope Provides 20X and 40X Magnification Objective Lens, 10X Eyepieces, 45 Degree Inclined Articulated Free Binocular Head and LED Lighting for Electronics IndustryMobile Repair, Common Soldering Mechanical Repair, Industrial Inspection Tool for Inspecting Larger Objects. 

Specification:
Wide Field Eyepiece: WF10X
Objective Lens: 2X and 4X
Total Magnification: 20X 40X
Working Distance of 2X objective lens is 81mm (3.19")
Working Distance of 4X objective lens is 57mm (2.24")
Working distance means the distance between the objective lens and the object when the focus is clear!

Because there is a black lens cover(Objective lens inside), so the height between the black lens cover and the stage is about 50mm when the focus is clear!
If you need 81mm and 57mm working distance, please take off the black lens cover!!!
Please pay attention on this!!!

There is a special way to add a 0.5X lens to extend the operation height to about 10cm.

Please kindly note you have to buy 0.5X lens separately!!!
0.5X lens Buylink:/products/microscope-assisted-objects-lens-auxiliary-0-5x-2-0x-0-7x

Articulated Free Binocular Head
Diopter Adjustment: +/-5dp
Interpupillary Distance: 55-75mm (2.17"-2.95"), 45 degree Inclined
Natural Light for Illuminating Gathered By Ø60mm Black and White Reversible Stage Plate
Power Supply: No
Rack and Pinion Coarse Focusing Mechanism With Slip Clutch and Tension Adjustment.

This microscope is useful for many applications. It can be used in geology, forestry, archaeology, agriculture, biology and is appropriate for educational purposes in hospitals and schools.

It is great for the exploration of the world of surface details and fine structures of various materials like wood, metal, solder, semiconductor and stone.

Package Included:
1 x Metal body stereo microscope with 2X 4X objective lens
1 x WF10X eyepiece
2 x Rubber Eye cups
1 x Dust cover
1 x LED Light