telescopecomparison · 2-way
Celestron RASA 8 vs Sky-Watcher Quattro 150P
Celestron
RASA 8
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Sky-Watcher
Quattro 150P
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-33% focal length
+35% aperture
Faster by 2.0 f-stops
Specifications
| Specification | Celestron RASA 8 | Sky-Watcher Quattro 150P |
|---|---|---|
| Optics | ||
| Type | SCT | newtonian |
| Optical design | Rowe-Ackermann Schmidt | Newtonian astrograph |
| Aperture | 203mm | 150mm |
| Focal length | 400mm | 600mm |
| Native f/ratio | f/2.0 | f/4.0 |
| Image circle | 32mm | — |
| Full-frame support | No | No |
| Physical | ||
| Weight | 7.7kg | 7.5kg |
Advantages of Celestron RASA 8
- Wider field — 400mm vs 600mm focal length
- 35% more light-gathering aperture
- Faster optics at f/2 vs f/4
- Larger image circle (32mm) — supports bigger sensors
Advantages of Sky-Watcher Quattro 150P
- Tighter framing — 600mm vs 400mm focal length
Best for — Celestron RASA 8
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
Best for — Sky-Watcher Quattro 150P
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
Celestron RASA 8 — 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
Sky-Watcher Quattro 150P — 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
Celestron RASA 8 — recommended user
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Sky-Watcher Quattro 150P — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.