telescopecomparison · 2-way
Sky-Watcher Quattro 250P vs SharpStar 76EDPH
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
+139% focal length
+229% aperture
Faster by 1.5 f-stops
Specifications
| Specification | Sky-Watcher Quattro 250P | SharpStar 76EDPH |
|---|---|---|
| Optics | ||
| Type | newtonian | Refractor |
| Optical design | Newtonian astrograph | Doublet APO |
| Aperture | 250mm | 76mm |
| Focal length | 1000mm | 418mm |
| Native f/ratio | f/4.0 | f/5.5 |
| Image circle | — | 42mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 15.5kg | 3.2kg |
Advantages of Sky-Watcher Quattro 250P
- Tighter framing — 1000mm vs 418mm focal length
- 229% more light-gathering aperture
- Faster optics at f/4 vs f/5.5
Advantages of SharpStar 76EDPH
- Wider field — 418mm vs 1000mm focal length
- Larger image circle (42mm) — supports bigger sensors
- Lighter (3.2kg 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 — SharpStar 76EDPH
- Large emission nebulae and star clusters
- 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
SharpStar 76EDPH — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.93° × 3.29°Scale: 1.86"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.22° × 2.15°Scale: 1.86"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.55° × 1.55°Scale: 1.86"/px
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
SharpStar 76EDPH — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.