telescopecomparison · 2-way
Askar FRA500 vs Askar 80PHQ
Askar
80PHQ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
-17% focal length
+13% aperture
Faster by 1.9 f-stops
Specifications
| Specification | Askar FRA500 | Askar 80PHQ |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Petzval Quintuplet APO | Petzval quintuplet FPL-51 |
| Aperture | 90mm | 80mm |
| Focal length | 500mm | 600mm |
| Native f/ratio | f/5.6 | f/7.5 |
| Image circle | 60mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 5.4kg | 4.5kg |
Advantages of Askar FRA500
- Wider field — 500mm vs 600mm focal length
- 13% more light-gathering aperture
- Faster optics at f/5.6 vs f/7.5
- Larger image circle (60mm) — supports bigger sensors
Advantages of Askar 80PHQ
- Tighter framing — 600mm vs 500mm focal length
- Lighter (4.5kg 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 — Askar 80PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
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
Askar 80PHQ — 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 FRA500 — recommended user
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Askar 80PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.