■ Technical specifications
1. Eyepiece tube: binoculars
2. Eyepiece: 10X, 12.5X (optional)
3. Field of view diameter (mm): 18, 15
4. Metallographic objective lens
a. Magnification factors: 4X, 10X, 20X, 40X
b. Numerical aperture (N.A): 0.10, 0.25, 0.40, 0.65
c. Effective working distance (mm): 17.912, 6.544, 1.05, 0.736
5. Medium: Dry
6. Objective lens converter: four hole type
7. Total magnification: 40X-400X
8. Platform area: 352mm * 256mm
Vertical movement stroke: 200mm; Lateral movement stroke: 200mm
9. Coarse and fine adjustment focusing range of 25mm, fine adjustment rotating one circle to raise and lower the sample by 0.2mm, with a grid value of 0.002mm
10. Light source: halogen lamp 6V20W, built-in continuous dimming power supply

Original old station parameter address: http://www.sgaaa.com/cp/jiancexianweijing.htm

■ Instrument completeness
1. Microscope body: 1 unit
2. Three eye tube: 1 piece
3.10X Eyepiece: 1 pair
4. Objective lenses 4X, 10X, 20X, 40X: 1 each
5. Random files: 1 set
■Optional parts
1. Eyepiece: 12.5X eyepiece; 10X micrometer mirror, micrometer ruler (grid value: 0.01mm)
2. Long working distance metallographic objective: 50X, 80X, 100X (dry)
3.3 million, 5 million, or 9 million digital cameras
4.0.5x adapter lens, digital adapter lens, digital camera
5. Professional research level image analysis software, computer