| BX61 | BX51 | BX51M | BX41M | BX41M-D |
| Optical system | UIS optical system (infinity-corrected) |
| Objectiv | UIS eyepiec |
| Eyepiec |
Microscope frame | Illumination | Reflected / tranitted | Reflected | Reflected (D treatment) |
| External 12V100W light source | Built-in 12V100W light source | Built-in 12V100W light source | Built-in 6V30W light source |
| Light pret switch |
| LED voltage indicator | - |
| Reflected / tranitted changeover switch | - |
| Focus | Motorized focusing | Stroke 25mm |
| Stroke 25mm | Fine stroke per rotation 100μm |
| Minimum graduation 0.01μm | Minimum graduation 1μm |
| - | With upper limit stopper, torque adjustment for coarse handle |
Maximum sample height | 25mm (w / o spacer) | 65mm (w / o spacer) |
Observation tub | Widefield (F.N. 22) | Inverted image: binocular, trinocular, tilting binocular Erect image: trinocular, tilting binocular |
Super widefield (F.N. 26.5) | Inverted image: trinocular Erect image: trinocular, tilting trinocular |
| Reflected light illumination | Reflected BF/DIC/KPO or BF / DF / DIC / KPO | BX-RLAA | BX-RLA2 | BX-KMA | BX-KMA-D |
Motorized BF / DF changeover Motorized AS | 100W halogen (high intensity burner, fiber illuminator mountable) BF / DF / DIC / KPO FS, AS (with centering mechani), BF/DF interlocking ND filter | 30W halogen BF / DIC / KPO | 30W halogen BF / DIC / KPO D treatment applied |
| Reflected fluorcence | BX-RFAA | BX-URA2 | - |
Motorized 6 position turret Built-in motorized shutter With FS, AS | 100W mercury lamp, 75W xenon lamp 50W metal halide lamp 6 position mirror unit turret (standard: WB, WG, WU+BF etc) with FS, AS (with centering mechani), with shutter mechani
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| Tranitted light | 100W halogen | - |
| Abbe / long working distance condensers |
| Built-in tranitted light filters (LBD, ND25, ND6) |
| Revolving nosepiec | For BF | Motorized tuple, centering quintuple | tuple, centering tuple, septuple (motorized tuple: optional) | tuple BF / BF with for a hole for DIC slider | tuple with D treatment |
| For BF / DF | Motorized quintuple | Quintuple,centering quintuple, tuple (motorized quintuple optional) | - |
| Stag | Coaxial left(right) handle stage: 76(X)x52(Y)mm, with torque adjustment |
| Large-size coaxial left (right) handle stage: 110(X)x105(Y)mm, with lock mechani in Y axis |