telescopecomparison · 2-way
William Optics Zenithstar 81 II vs Sky-Watcher Evolux 82ED
William Optics
Zenithstar 81 II
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Sky-Watcher
Evolux 82ED
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Specifications
| Specification | William Optics Zenithstar 81 II | Sky-Watcher Evolux 82ED |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo doublet FPL-53 | Apo doublet FPL-53 |
| Aperture | 81mm | 82mm |
| Focal length | 478mm | 499mm |
| Native f/ratio | f/5.9 | f/6.1 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 3.6kg | 3.6kg |
Advantages of William Optics Zenithstar 81 II
Closely matched on the compared specs.
Advantages of Sky-Watcher Evolux 82ED
Closely matched on the compared specs.
Best for — William Optics Zenithstar 81 II
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Evolux 82ED
- Large emission nebulae and star clusters
William Optics Zenithstar 81 II — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.32° × 2.88°Scale: 1.62"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.82° × 1.88°Scale: 1.62"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.35° × 1.35°Scale: 1.62"/px
Sky-Watcher Evolux 82ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.13° × 2.76°Scale: 1.55"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.70° × 1.80°Scale: 1.55"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.30° × 1.30°Scale: 1.55"/px
William Optics Zenithstar 81 II — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Sky-Watcher Evolux 82ED — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.