telescopecomparison · 2-way
Astro-Physics 92mm f/6.65 Stowaway vs Askar 80PHQ
Astro-Physics
92mm f/6.65 Stowaway
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Askar
80PHQ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
+15% aperture
Faster by 0.8 f-stops
Specifications
| Specification | Astro-Physics 92mm f/6.65 Stowaway | Askar 80PHQ |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo triplet | Petzval quintuplet FPL-51 |
| Aperture | 92mm | 80mm |
| Focal length | 612mm | 600mm |
| Native f/ratio | f/6.7 | f/7.5 |
| Image circle | — | 44mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 3.2kg | 4.5kg |
Advantages of Astro-Physics 92mm f/6.65 Stowaway
- 15% more light-gathering aperture
- Faster optics at f/6.65 vs f/7.5
- Lighter (3.2kg vs 4.5kg) — easier to travel with
Advantages of Askar 80PHQ
- Larger image circle (44mm) — supports bigger sensors
Best for — Astro-Physics 92mm f/6.65 Stowaway
- Large emission nebulae and star clusters
Best for — Askar 80PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Astro-Physics 92mm f/6.65 Stowaway — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.37° × 2.25°Scale: 1.27"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.20° × 1.47°Scale: 1.27"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.06° × 1.06°Scale: 1.27"/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
Astro-Physics 92mm f/6.65 Stowaway — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Askar 80PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
