NPTA-3
| Optical System | lnfinite Optical System |
| Head | 1 pcs Trinocular Head, 30°Inclined, 360° Rotatable, Interpupilary Distance 48-75mm |
| 4 pcs Brinocular Head, 30°Inclined, 360° Rotatable, Interpupilary Distance 48-75mm | |
| Eyepiece | WF10X, 10 pcs |
| Objective | Infinity Plan Achromatic 4x, 10x, 40x(s), 100x(s, oil) |
| Nosepiece | Reversed Quintuple Revolving Nosepiece |
| Stage | Double Layers Mechanical Stage 185x142mm, Moving Range 75x55mm |
| Focusing | Coaxial Coarse & Fine Focusing Knobs, Fine division 0.002mm |
| Condenser | Swing Abbe Condenser N.A.0.9/0.25 |
| Light Source | External Kohler Illumination, Halogen Lamp 12V50W |
| Pointer | Green LED Pointer, Brightness Adjustable |
