OTA · 1971–
Celestron C5 (Orange Tube)
Key specifications
| Aperture | 127 mm |
|---|---|
| Focal length | 1250 mm |
| Focal ratio | f/10 |
| Optical design | Schmidt-Cassegrain |
About
Vintage Celestron 5" schmidt-cassegrain (1250mm f/10). 1971 5" SCT -- a smaller, more portable companion to the C8 (essentially a photo-reduced C8). Orange tube, twin-arm fork. Discontinued 1983 to focus C8 production, later revived.