Orion SkyQuest XT4.5 Classic Dobsonian vs Sky-Watcher Classic 250P (10-inch Dobsonian): specs compared
Updated 05 September 2026.
254 mm
Sky-Watcher Classic 250P (10-inch Dobsonian) wins on aperture
On aperture, Sky-Watcher Classic 250P (10-inch Dobsonian) leads: 254 mm versus 114 mm.
| Spec | Orion SkyQuest XT4.5 Classic Dobsonian | Sky-Watcher Classic 250P (10-inch Dobsonian) |
|---|---|---|
| Aperture | 114 mm (4.49 in) | 254 mm (10 in) |
| Focal length | 900 mm | 1200 mm |
| Focal ratio | f/7.9 | f/4.7 |
| Optical design | Newtonian reflector (parabolic primary) | Newtonian reflector (parabolic primary) |
| Focuser / eyepiece barrel | 1.25 in rack-and-pinion focuser | 2 in Crayford focuser with a 1.25 in adapter |
| Mount | Manual Dobsonian base | Manual Dobsonian base |
| Highest useful magnification (2x aperture rule) | about 228x | about 508x |
| Optical tube weight | 30 lb |
Questions and answers
Which has the higher aperture, Orion SkyQuest XT4.5 Classic Dobsonian or Sky-Watcher Classic 250P (10-inch Dobsonian)?
On aperture, Sky-Watcher Classic 250P (10-inch Dobsonian) leads: 254 mm versus 114 mm.
How do Orion SkyQuest XT4.5 Classic Dobsonian and Sky-Watcher Classic 250P (10-inch Dobsonian) compare?
On aperture, Sky-Watcher Classic 250P (10-inch Dobsonian) leads: 254 mm versus 114 mm.