telescopecomparison · 2-way
Sky-Watcher Quattro 250P vs Explore Scientific ED127 FCD-100
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Explore Scientific
ED127 FCD-100
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+5% focal length
+97% aperture
Faster by 3.5 f-stops
Specifications
| Specification | Sky-Watcher Quattro 250P | Explore Scientific ED127 FCD-100 |
|---|---|---|
| Optics | ||
| Type | newtonian | Refractor |
| Optical design | Newtonian astrograph | Triplet APO |
| Aperture | 250mm | 127mm |
| Focal length | 1000mm | 952mm |
| Native f/ratio | f/4.0 | f/7.5 |
| Image circle | — | 40mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 15.5kg | 8.6kg |
Advantages of Sky-Watcher Quattro 250P
- 97% more light-gathering aperture
- Faster optics at f/4 vs f/7.5
Advantages of Explore Scientific ED127 FCD-100
- Larger image circle (40mm) — supports bigger sensors
- Lighter (8.6kg 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 — Explore Scientific ED127 FCD-100
- 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
Explore Scientific ED127 FCD-100 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.17° × 1.44°Scale: 0.81"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.41° × 0.94°Scale: 0.81"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.68° × 0.68°Scale: 0.81"/px
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Explore Scientific ED127 FCD-100 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.