telescopecomparison · 2-way
Sky-Watcher Quattro 250P vs Tele Vue TV-85
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Tele Vue
TV-85
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
+67% focal length
+194% aperture
Faster by 3.0 f-stops
Specifications
| Specification | Sky-Watcher Quattro 250P | Tele Vue TV-85 |
|---|---|---|
| Optics | ||
| Type | newtonian | refractor |
| Optical design | Newtonian astrograph | Apo doublet |
| Aperture | 250mm | 85mm |
| Focal length | 1000mm | 600mm |
| Native f/ratio | f/4.0 | f/7.0 |
| Image circle | — | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 15.5kg | 2.9kg |
Advantages of Sky-Watcher Quattro 250P
- Tighter framing — 1000mm vs 600mm focal length
- 194% more light-gathering aperture
- Faster optics at f/4 vs f/7
Advantages of Tele Vue TV-85
- Wider field — 600mm vs 1000mm focal length
- Lighter (2.9kg 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 — Tele Vue TV-85
- Large emission nebulae and star clusters
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
Tele Vue TV-85 — 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
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Tele Vue TV-85 — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.