| Item | Specification | BS-2042B | BS-2042T |
| Optical System | Infinite Color Corrected Optical System | ● | ● |
| Viewing Head | Seidentopf binocular head, 30° inclined, Interpupillary 48-75mm | ● | |
| Seidentopf trinocular head, 30° inclined, Interpupillary 48-75mm, Light splitting ratio: Eyepiece:Trinocular=8:2 | ● | ||
| Eyepiece | Plan 10×/18mm with adjustable diopter | ● | ● |
| Plan 10×/20mm with adjustable diopter | ○ | ○ | |
| Objective | Infinite plan Achromatic Objectives 4×, 10×, 40×, 100× | ● | ● |
| Nosepiece | Reversed Quadruple Nosepiece | ● | ● |
| Reversed Quintuple Nosepiece | ○ | ○ | |
| Stage | Double Layers Mechanical Stage 140mm×132mm, moving range 76mm×50mm | ● | ● |
| Condenser | NA1.25 Condenser (with slot for phase contrast and darkfield accessories) | ● | ● |
| Focusing | Coaxial focusing system with tension adjustable, coarse:25mm per rotation, with upper limit and tightness adjustment, Fine Division 0.002mm | ● | ● |
| Illumination | 100V-240V, single high brightness 3W LED Koehler illumination, intensity adjustable | ● | ● |
| 100V-240V, Philips 6V/20W halogen Koehler illumination, intensity adjustable | ○ | ○ | |
| Optional accessories | Phase Contrast Kit | ○ | ○ |
| Dark Field Attachment | ○ | ○ | |
| Polarizing attachment | ○ | ○ | |
| Video & photo accessories (1/3×, 1/2×, 1× C-mount) | ○ | ||
| Various filters (Blue, Green, Yellow and frosted) | ○ | ○ |
BS-2042B
BS-2042T
Unit: mm