telescopecomparison · 2-way
Askar FRA500 vs Sky-Watcher Evostar 72ED
Sky-Watcher
Evostar 72ED
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+19% focal length
+25% aperture
Specifications
| Specification | Askar FRA500 | Sky-Watcher Evostar 72ED |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Petzval Quintuplet APO | Apo doublet FPL-53 |
| Aperture | 90mm | 72mm |
| Focal length | 500mm | 420mm |
| Native f/ratio | f/5.6 | f/5.8 |
| Image circle | 60mm | 44mm |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 5.4kg | 2.4kg |
Advantages of Askar FRA500
- Tighter framing — 500mm vs 420mm focal length
- 25% more light-gathering aperture
- Larger image circle (60mm) — supports bigger sensors
Advantages of Sky-Watcher Evostar 72ED
- Wider field — 420mm vs 500mm focal length
- Lighter (2.4kg vs 5.4kg) — easier to travel with
Best for — Askar FRA500
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Evostar 72ED
- Large emission nebulae and star clusters
Askar FRA500 — 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 72ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.91° × 3.27°Scale: 1.85"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.21° × 2.14°Scale: 1.85"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.54° × 1.54°Scale: 1.85"/px
Askar FRA500 — recommended user
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Sky-Watcher Evostar 72ED — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.