OTA · 1978–
Celestron C11 (Orange Tube)
Key specifications
| Aperture | 279 mm |
|---|---|
| Focal length | 2800 mm |
| Focal ratio | f/10 |
| Optical design | Schmidt-Cassegrain |
About
Vintage Celestron 11" schmidt-cassegrain (2800mm f/10). 11" f/10 SCT added to the orange-tube line in the late 1970s. Fork-mounted.