Celestron C11 optical tube vs Celestron NexStar 4SE: specs compared
Updated 05 September 2026.
280 mm
Celestron C11 optical tube wins on aperture
On aperture, Celestron C11 optical tube leads: 280 mm versus 102 mm.
| Spec | Celestron C11 optical tube | Celestron NexStar 4SE |
|---|---|---|
| Aperture | 280 mm (11.02 in) | 102 mm (4.02 in) |
| Focal length | 2800 mm | 1325 mm |
| Focal ratio | f/10 | f/13 |
| Optical design | Schmidt-Cassegrain | Maksutov-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 |
| Mount | Optical tube only (CGE / Vixen dovetail), no mount supplied | Computerized single-fork altazimuth (GoTo) |
| Highest useful magnification (published) | 660x | 241x |
| Optical tube weight | 28 lb | 5 lb |
Questions and answers
Which has the higher aperture, Celestron C11 optical tube or Celestron NexStar 4SE?
On aperture, Celestron C11 optical tube leads: 280 mm versus 102 mm.
How do Celestron C11 optical tube and Celestron NexStar 4SE compare?
On aperture, Celestron C11 optical tube leads: 280 mm versus 102 mm.