Sky-Watcher Evostar 100ED vs Sky-Watcher Skymax 102: specs compared
Updated 05 September 2026.
102 mm
Sky-Watcher Skymax 102 wins on aperture
On aperture, Sky-Watcher Skymax 102 leads: 102 mm versus 100 mm.
| Spec | Sky-Watcher Evostar 100ED | Sky-Watcher Skymax 102 |
|---|---|---|
| Aperture | 100 mm (3.94 in) | 102 mm (4.02 in) |
| Focal length | 900 mm | 1300 mm |
| Focal ratio | f/9 | f/12.7 |
| Optical design | ED doublet apochromatic refractor | Maksutov-Cassegrain |
| Focuser / eyepiece barrel | 2 in dual-speed Crayford focuser with a 1.25 in adapter | 1.25 in visual back; rear thread accepts a 1.25 in or 2 in back |
| Mount | Optical tube (Vixen dovetail), no mount supplied | Optical tube (V-style dovetail), sold as OTA or on a GoTo mount |
| Highest useful magnification (published) | 236x | |
| Highest useful magnification (2x aperture rule) | about 204x |
Questions and answers
Which has the higher aperture, Sky-Watcher Evostar 100ED or Sky-Watcher Skymax 102?
On aperture, Sky-Watcher Skymax 102 leads: 102 mm versus 100 mm.
How do Sky-Watcher Evostar 100ED and Sky-Watcher Skymax 102 compare?
On aperture, Sky-Watcher Skymax 102 leads: 102 mm versus 100 mm.