telescopecomparison · 2-way
Sky-Watcher Quattro 250P vs Askar 107PHQ
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Askar
107PHQ
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+34% focal length
+134% aperture
Faster by 3.0 f-stops
Specifications
| Specification | Sky-Watcher Quattro 250P | Askar 107PHQ |
|---|---|---|
| Optics | ||
| Type | newtonian | refractor |
| Optical design | Newtonian astrograph | Petzval quintuplet FPL-51 |
| Aperture | 250mm | 107mm |
| Focal length | 1000mm | 749mm |
| Native f/ratio | f/4.0 | f/7.0 |
| Image circle | — | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 15.5kg | 7.5kg |
Advantages of Sky-Watcher Quattro 250P
- Tighter framing — 1000mm vs 749mm focal length
- 134% more light-gathering aperture
- Faster optics at f/4 vs f/7
Advantages of Askar 107PHQ
- Wider field — 749mm vs 1000mm focal length
- Larger image circle (43.9mm) — supports bigger sensors
- Lighter (7.5kg vs 15.5kg) — easier to travel with
Best for — Sky-Watcher Quattro 250P
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Best for — Askar 107PHQ
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Sky-Watcher Quattro 250P — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.06° × 1.38°Scale: 0.78"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.35° × 0.90°Scale: 0.78"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.65° × 0.65°Scale: 0.78"/px
Askar 107PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.75° × 1.84°Scale: 1.04"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.80° × 1.20°Scale: 1.04"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.86° × 0.86°Scale: 1.04"/px
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Askar 107PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.