telescopecomparison · 2-way
Sky-Watcher Quattro 250P vs Orion 8" f/3.9 Newtonian Astrograph
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Orion
8" f/3.9 Newtonian Astrograph
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+25% focal length
+23% aperture
Specifications
| Specification | Sky-Watcher Quattro 250P | Orion 8" f/3.9 Newtonian Astrograph |
|---|---|---|
| Optics | ||
| Type | newtonian | newtonian |
| Optical design | Newtonian astrograph | Newtonian astrograph |
| Aperture | 250mm | 203mm |
| Focal length | 1000mm | 800mm |
| Native f/ratio | f/4.0 | f/3.9 |
| Image circle | — | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 15.5kg | 10.5kg |
Advantages of Sky-Watcher Quattro 250P
- Tighter framing — 1000mm vs 800mm focal length
- 23% more light-gathering aperture
Advantages of Orion 8" f/3.9 Newtonian Astrograph
- Wider field — 800mm vs 1000mm focal length
- Lighter (10.5kg 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 — Orion 8" f/3.9 Newtonian Astrograph
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
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
Orion 8" f/3.9 Newtonian Astrograph — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.58° × 1.72°Scale: 0.97"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.68° × 1.12°Scale: 0.97"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.81° × 0.81°Scale: 0.97"/px
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Orion 8" f/3.9 Newtonian Astrograph — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.