Sky-Watcher Evostar 80ED vs Sky-Watcher Flextube 300P (12-inch Dobsonian): specs compared
Updated 05 September 2026.
305 mm
Sky-Watcher Flextube 300P (12-inch Dobsonian) wins on aperture
On aperture, Sky-Watcher Flextube 300P (12-inch Dobsonian) leads: 305 mm versus 80 mm.
| Spec | Sky-Watcher Evostar 80ED | Sky-Watcher Flextube 300P (12-inch Dobsonian) |
|---|---|---|
| Aperture | 80 mm (3.15 in) | 305 mm (12.01 in) |
| Focal length | 600 mm | 1500 mm |
| Focal ratio | f/7.5 | f/4.9 |
| Optical design | ED doublet apochromatic refractor | Newtonian reflector (parabolic primary, collapsible) |
| Focuser / eyepiece barrel | 2 in dual-speed Crayford focuser with a 1.25 in adapter | 2 in Crayford focuser with a 1.25 in adapter |
| Mount | Optical tube (Vixen dovetail), no mount supplied | Manual collapsible Dobsonian base |
| Highest useful magnification (published) | 189x | |
| Highest useful magnification (2x aperture rule) | about 610x |
Questions and answers
Which has the higher aperture, Sky-Watcher Evostar 80ED or Sky-Watcher Flextube 300P (12-inch Dobsonian)?
On aperture, Sky-Watcher Flextube 300P (12-inch Dobsonian) leads: 305 mm versus 80 mm.
How do Sky-Watcher Evostar 80ED and Sky-Watcher Flextube 300P (12-inch Dobsonian) compare?
On aperture, Sky-Watcher Flextube 300P (12-inch Dobsonian) leads: 305 mm versus 80 mm.