| Items | O-I21 | O-I22 | Order No. |
| Main Boby (Including Left & Right Supporting Arm) | ● | ● | / |
| Eyepiece WF10×-20 mm | ●● | ●● | WF10a |
| Eyepiece WF16×-13 mm | ○○ | ●● | WF16 |
| Article Eyepiece10×(0.1mm) | ○ | ● | WF10R |
| LWD Plan Achromat Objective LPL2.5×/0.07 W.D.=29.7mm | ○ | ○ | B-LP2.5 |
| LWD Plan Achromat Objective LPL4×/0.10 W.D.=17.5mm | ○ | ● | B-LP4 |
| LWD Plan Achromat Objective LPL10×/0.25 W.D.=7.9mm | ● | ○ | B-LP10 |
| LWD Plan Achromat Objective LPL25X/0.40 W.D.=5.0mm | ● | ● | B-LP25 |
| LWD Plan Achromat Objective LPL40×/0.65 W.D.=3.0mm | ● | ● | B-LP40 |
| LWD Plan Phase Contrast Objective LPL Ph+10×/0.25 W.D.=7.9mm | ○ | ● | B-LPh10 |
| LWD Plan Phase Contrast Objective LPL Ph+25×/0.40 W.D.=5.0mm | ● | ● | B-LPh25 |
| LWD Plan Phase Contrast Objective LPL Ph+40×/0.25 W.D.=3.0mm | ○ | ● | B-LPh40 |
| Phase Contrast Annular Spot 10× | ○ | ● | Ph10 |
| Phase Contrast Annular Spot 25× | ● | ● | Ph25 |
| Phase Contrast Annular Spot 40× | ○ | ● | Ph40 |
| Condenser N.A.0.35 (W.D. 45/102mm) | ● | ● | Ca-2 |
| Seidentopf Trinocular Head (Inclined 45°) | ● | ● | Tri-2 |
| Stage (With Attached Mechanical Stagel) | ● | ● | S-Ma3 |
| Filter (Blue) | ● | ● | F-1 |
| Filter (Green) | ● | ● | F-2 |
| C-mount Adaptor 1× | ○ | ● | C-m1 |