telescopecomparison · 2-way
Celestron C8 SCT vs Sky-Watcher Quattro 250P
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
+103% focal length
-19% aperture
Slower by 6.0 f-stops
Specifications
| Specification | Celestron C8 SCT | Sky-Watcher Quattro 250P |
|---|---|---|
| Optics | ||
| Type | sct | newtonian |
| Optical design | Schmidt-Cassegrain | Newtonian astrograph |
| Aperture | 203mm | 250mm |
| Focal length | 2032mm | 1000mm |
| Native f/ratio | f/10.0 | f/4.0 |
| Image circle | — | — |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 5.7kg | 15.5kg |
Advantages of Celestron C8 SCT
- Tighter framing — 2032mm vs 1000mm focal length
- Lighter (5.7kg vs 15.5kg) — easier to travel with
Advantages of Sky-Watcher Quattro 250P
- Wider field — 1000mm vs 2032mm focal length
- 23% more light-gathering aperture
- Faster optics at f/4 vs f/10
Best for — Celestron C8 SCT
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
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
Celestron C8 SCT — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.02° × 0.68°Scale: 0.38"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.66° × 0.44°Scale: 0.38"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.32° × 0.32°Scale: 0.38"/px
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
Celestron C8 SCT — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.