telescopecomparison · 2-way
Askar 80PHQ vs Askar 151PHQ
Askar
80PHQ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Askar
151PHQ
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
-43% focal length
-47% aperture
Slower by 0.5 f-stops
Specifications
| Specification | Askar 80PHQ | Askar 151PHQ |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Petzval quintuplet FPL-51 |
| Aperture | 80mm | 151mm |
| Focal length | 600mm | 1057mm |
| Native f/ratio | f/7.5 | f/7.0 |
| Image circle | 44mm | 60mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 4.5kg | 15.5kg |
Advantages of Askar 80PHQ
- Wider field — 600mm vs 1057mm focal length
- Lighter (4.5kg vs 15.5kg) — easier to travel with
Advantages of Askar 151PHQ
- Tighter framing — 1057mm vs 600mm focal length
- 89% more light-gathering aperture
- Faster optics at f/7 vs f/7.5
- Larger image circle (60mm) — supports bigger sensors
Best for — Askar 80PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar 151PHQ
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
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 151PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.95° × 1.30°Scale: 0.73"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.27° × 0.85°Scale: 0.73"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.61° × 0.61°Scale: 0.73"/px
Askar 80PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Askar 151PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.