telescopecomparison · 2-way
Askar FRA400 vs Askar 80PHQ
Askar
80PHQ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
-33% focal length
-10% aperture
Faster by 1.9 f-stops
Specifications
| Specification | Askar FRA400 | Askar 80PHQ |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Petzval Quintuplet APO | Petzval quintuplet FPL-51 |
| Aperture | 72mm | 80mm |
| Focal length | 400mm | 600mm |
| Native f/ratio | f/5.6 | f/7.5 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.9kg | 4.5kg |
Advantages of Askar FRA400
- Wider field — 400mm vs 600mm focal length
- Faster optics at f/5.6 vs f/7.5
Advantages of Askar 80PHQ
- Tighter framing — 600mm vs 400mm focal length
- 11% more light-gathering aperture
Best for — Askar FRA400
- 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 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
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 FRA400 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar 80PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.