| Model | BM2100 | ||
| Optical System | Infinite Optical System | ● | |
| Seidentopf Binocular Viewing Head, Inclined at | ● | ||
| Viewing Head | 30°, 360° Rotatable, Interpupillary 48-75mm | ||
| Seidentopf Trinocular Head Inclined at 30°, | ○ | ||
| Interpupillary 48-75mm | |||
| Eyepiece | Ф30 Wide Field Eyepiece EW10×/22, Eyepiece | ● | |
| Tube Diameter 30mm | |||
| Wide Field Eyepiece EW15×/16 | ○ | ||
| Wide Field Eyepiece EW20×/12 | ○ | ||
| Nosepiece | Backward Quintuple Nosepiece | ● | |
| Backward Quadruple Nosepiece | ○ | ||
| Objective | Infinite Plan Achromatic Objective 4×,10×,40×,100× | ● | |
| Infinite Plan Achromatic Objective 20×,60× | ○ | ||
| Condenser | Abbe Condenser NA1.25 with Aperture Diaphragm | ● | |
| Focusing System | Coaxial Coarse and Fine Adjustment, Fine Division | ● | |
| 0.002mm, Coarse Stroke 37.7mm per Rotation, | |||
| Fine Stroke 0.2mm per Rotation, Moving | |||
| Range 24mm | |||
| Stage | Double Layers Mechanical Stage 230×150mm, | ● | |
| Moving Range 78×54mm | |||
| Illumination | 12V/20W Halogen Lamp, Brightness Adjustable | ● | |
| 12V/30W Halogen Lamp, Brightness Adjustable | ○ | ||
| LED Illumination | ○ | ||
| Accessories | Photo Attachment | ○ | |
| Video Adapter | C Mount 0.4× | ○ | |
| C Mount 0.5× | ○ | ||
| Polarization Attachment | ○ | ||
| Phase Contrast Kit | ○ | ||
| Dark Field Attachment | Dark-field Condenser (Dry) | ○ | |
| Dark-field Condenser (Oil) | ○ | ||
| Kohler Illumination | ○ | ||
| Epi-Fluorescent Attachment | ○ | ||