telescopecomparison · 2-way
Askar SQA85 vs Sky-Watcher Evostar 80ED
Sky-Watcher
Evostar 80ED
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
-17% focal length
+6% aperture
Faster by 1.7 f-stops
Specifications
| Specification | Askar SQA85 | Sky-Watcher Evostar 80ED |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Quadruplet astrograph FPL-51 | Apo doublet FPL-53 |
| Aperture | 85mm | 80mm |
| Focal length | 500mm | 600mm |
| Native f/ratio | f/5.8 | f/7.5 |
| Image circle | 52mm | 44mm |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 4.4kg | 3.8kg |
Advantages of Askar SQA85
- Wider field — 500mm vs 600mm focal length
- Faster optics at f/5.8 vs f/7.5
- Larger image circle (52mm) — supports bigger sensors
Advantages of Sky-Watcher Evostar 80ED
- Tighter framing — 600mm vs 500mm focal length
Best for — Askar SQA85
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Evostar 80ED
- Large emission nebulae and star clusters
Askar SQA85 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.13° × 2.75°Scale: 1.55"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.69° × 1.80°Scale: 1.55"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.29° × 1.29°Scale: 1.55"/px
Sky-Watcher Evostar 80ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.44° × 2.29°Scale: 1.29"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.24° × 1.50°Scale: 1.29"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.08° × 1.08°Scale: 1.29"/px
Askar SQA85 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Sky-Watcher Evostar 80ED — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.