| Midwest Optical | EXT-50.0 | | C-Mount, CS-Mount | 50 mm | Includes: 50.0mm ring |
| Midwest Optical | EXT-100.0 | | C-Mount, CS-Mount | 100 mm | Includes: 100.0mm ring |
| Midwest Optical | EXT-40.0 | | C-Mount, CS-Mount | 40 mm | Includes: 40.0mm ring |
| Midwest Optical | EXT-20.0 | | C-Mount, CS-Mount | 20 mm | Includes: 20.0mm ring |
| Midwest Optical | EXT-30.0 | | C-Mount, CS-Mount | 30 mm | Includes: 30.0mm ring |
| Midwest Optical | EXT-15.0 | | C-Mount, CS-Mount | 15 mm | Includes: 15.0mm ring |
| Midwest Optical | EXT-5.0 | | C-Mount, CS-Mount | 5 mm | Includes: 5.0mm ring |
| Midwest Optical | EXT-10.0 | | C-Mount, CS-Mount | 10 mm | Includes: 10.0mm ring |
| Midwest Optical | EXT-2.0 | | C-Mount, CS-Mount | 2 mm | Includes: 2.0mm ring |
| Midwest Optical | EXT-0.5 | | C-Mount, CS-Mount | 0.5 mm | Includes: 0.5mm ring |
| Midwest Optical | EXT-1.0 | | C-Mount, CS-Mount | 1 mm | Includes: 1.0mm ring |
| Midwest Optical | EXT-S-SET | | C-Mount, CS-Mount | N/A | Includes: 40mm, 20mm, 10mm, 5mm, 1mm and 0.5mm rings |
| Midwest Optical | EXT-UL-SET | | C-Mount, CS-Mount | N/A | Includes: 20mm, 10mm, 5mm and 1mm rings |
| Computar | VM100 | | C-Mount, CS-Mount | N/A | Includes: 40mm, 20mm, 10mm, 5mm, 1mm and 0.5mm rings |
| Computar | VM400 | | C-Mount, CS-Mount | 5 mm | Adapts C-Mount Lens To CS-Mount Camera |
