telescopecomparison · 2-way
Takahashi TSA-120 vs Sky-Watcher Quattro 150P
Takahashi
TSA-120
Best suited for intermediate imagers building a versatile kit 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
+50% focal length
-20% aperture
Slower by 3.5 f-stops
Specifications
| Specification | Takahashi TSA-120 | Sky-Watcher Quattro 150P |
|---|---|---|
| Optics | ||
| Type | Refractor | newtonian |
| Optical design | Triplet APO | Newtonian astrograph |
| Aperture | 120mm | 150mm |
| Focal length | 900mm | 600mm |
| Native f/ratio | f/7.5 | f/4.0 |
| Image circle | 44mm | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 7.5kg | 7.5kg |
Advantages of Takahashi TSA-120
- Tighter framing — 900mm vs 600mm focal length
- Larger image circle (44mm) — supports bigger sensors
Advantages of Sky-Watcher Quattro 150P
- Wider field — 600mm vs 900mm focal length
- 25% more light-gathering aperture
- Faster optics at f/4 vs f/7.5
Best for — Takahashi TSA-120
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Quattro 150P
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
Takahashi TSA-120 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.29° × 1.53°Scale: 0.86"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.50° × 1.00°Scale: 0.86"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.72° × 0.72°Scale: 0.86"/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
Takahashi TSA-120 — recommended user
Best suited for intermediate imagers building a versatile kit 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.