Celestron C8 optical tube vs Celestron C9.25 optical tube: specs compared
Updated 05 September 2026.
235 mm
Celestron C9.25 optical tube wins on aperture
On aperture, Celestron C9.25 optical tube leads: 235 mm versus 203 mm.
| Spec | Celestron C8 optical tube | Celestron C9.25 optical tube |
|---|---|---|
| Aperture | 203 mm (7.99 in) | 235 mm (9.25 in) |
| Focal length | 2032 mm | 2350 mm |
| Focal ratio | f/10 | f/10 |
| Optical design | Schmidt-Cassegrain | Schmidt-Cassegrain |
| Focuser / eyepiece barrel | 1.25 in visual back (SCT rear cell); a 2 in diagonal fits with an SCT-to-2 in adapter | 1.25 in visual back (SCT rear cell); a 2 in diagonal fits with an SCT-to-2 in adapter |
| Mount | Optical tube only (CGE / Vixen dovetail), no mount supplied | Optical tube only (CGE / Vixen dovetail), no mount supplied |
| Highest useful magnification (published) | 480x | 555x |
| Optical tube weight | 12.5 lb | 20 lb |
Questions and answers
Which has the higher aperture, Celestron C8 optical tube or Celestron C9.25 optical tube?
On aperture, Celestron C9.25 optical tube leads: 235 mm versus 203 mm.
How do Celestron C8 optical tube and Celestron C9.25 optical tube compare?
On aperture, Celestron C9.25 optical tube leads: 235 mm versus 203 mm.