| Model | N-400M | |
| Viewing Head | Compensation Free Binocular Head, Inclined at 30°, 360° Rotatable | ● |
| Monocular Head, Inclined at 30°, 360° Rotatable | ○ | |
| Compensation Free Trinocular Head, Inclined at 30°, 360° Rotatable | ○ | |
| Eyepiece | Wide Field Eyepiece WF10×/ 18 | ● |
| Wide Field Eyepiece WF16×/ 11 | ○ | |
| Objective | Achromatic Objective 4×, 10×, 40×, 100× | ● |
| Achromatic Objective 20×, 60× | ○ | |
| Plan Achromatic Objective 4×, 10×, 20×, 40×, 60×, 100× | ○ | |
| Nosepiece | Backward Quadruple Nosepiece | ● |
| Backward Quintuple Nosepiece | ○ | |
| Stage | Double Layers Mechanical Stage 140×140mm/ 75×50mm | ● |
| Condenser | NA 1.25 Abbe Condenser with lris Diaphragm and Filter, Rack & Pinion Adjustment | ● |
| Focusing | Coaxial Coarse & Fine Adjustment System, Range 28mm, Fine Division 0.002mm | ● |
| Illumination | S-LED Illumination, Brightness Adjustable | ● |
| Halogen Lamp 6V/ 20W, Brightness Adjustable | ○ | |
| Kohler Illumination | ○ | |
| Polarization Set | Simple Polarization Set | ○ |
| Phase Contrast Kit | Simple Phase Contrast Kit | ○ |
| Sliding Phase Contrast Kit | ○ | |
| Turret Phase Contrast Kit | ○ | |
| Dark Field Attachment | Dark Field Condenser (Dry) NA 0.9 | ○ |
| Dark Field Condenser (Oil) NA 1.25-1.36 | ○ | |
| Epi-fluorescent Attachment | ○ | |
| Filter | Green Filter | ● |
| Blue Filter | ○ | |
| Photo Attachment | ○ | |
| Video Attachment | ○ |