telescopecomparison · 2-way
Sky-Watcher Evolux 82ED vs Askar FRA400
Sky-Watcher
Evolux 82ED
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+25% focal length
+14% aperture
Slower by 0.5 f-stops
Specifications
| Specification | Sky-Watcher Evolux 82ED | Askar FRA400 |
|---|---|---|
| Optics | ||
| Type | refractor | Refractor |
| Optical design | Apo doublet FPL-53 | Petzval Quintuplet APO |
| Aperture | 82mm | 72mm |
| Focal length | 499mm | 400mm |
| Native f/ratio | f/6.1 | f/5.6 |
| Image circle | 44mm | 44mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 3.6kg | 3.9kg |
Advantages of Sky-Watcher Evolux 82ED
- Tighter framing — 499mm vs 400mm focal length
- 14% more light-gathering aperture
Advantages of Askar FRA400
- Wider field — 400mm vs 499mm focal length
- Faster optics at f/5.6 vs f/6.1
Best for — Sky-Watcher Evolux 82ED
- Large emission nebulae and star clusters
Best for — Askar FRA400
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
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
Askar FRA400 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 5.16° × 3.44°Scale: 1.94"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.37° × 2.25°Scale: 1.94"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.62° × 1.62°Scale: 1.94"/px
Sky-Watcher Evolux 82ED — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar FRA400 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.