Celestron StarSense Explorer 8-inch Dobsonian vs Orion SkyQuest XT4.5 Classic Dobsonian: specs compared
Updated 05 September 2026.
203 mm
Celestron StarSense Explorer 8-inch Dobsonian wins on aperture
On aperture, Celestron StarSense Explorer 8-inch Dobsonian leads: 203 mm versus 114 mm.
| Spec | Celestron StarSense Explorer 8-inch Dobsonian | Orion SkyQuest XT4.5 Classic Dobsonian |
|---|---|---|
| Aperture | 203 mm (7.99 in) | 114 mm (4.49 in) |
| Focal length | 1200 mm | 900 mm |
| Focal ratio | f/5.9 | f/7.9 |
| Optical design | Newtonian reflector (parabolic primary) | Newtonian reflector (parabolic primary) |
| Focuser / eyepiece barrel | 2 in Crayford focuser with a 1.25 in adapter | 1.25 in rack-and-pinion focuser |
| Mount | Manual Dobsonian base (StarSense phone dock) | Manual Dobsonian base |
| Highest useful magnification (published) | 480x | |
| Highest useful magnification (2x aperture rule) | about 228x |
Questions and answers
Which has the higher aperture, Celestron StarSense Explorer 8-inch Dobsonian or Orion SkyQuest XT4.5 Classic Dobsonian?
On aperture, Celestron StarSense Explorer 8-inch Dobsonian leads: 203 mm versus 114 mm.
How do Celestron StarSense Explorer 8-inch Dobsonian and Orion SkyQuest XT4.5 Classic Dobsonian compare?
On aperture, Celestron StarSense Explorer 8-inch Dobsonian leads: 203 mm versus 114 mm.