telescopecomparison · 2-way
Takahashi TSA-120 vs Sky-Watcher Esprit 120EDX
Takahashi
TSA-120
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Sky-Watcher
Esprit 120EDX
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+7% focal length
Slower by 0.5 f-stops
Specifications
| Specification | Takahashi TSA-120 | Sky-Watcher Esprit 120EDX |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Triplet APO | Apo triplet |
| Aperture | 120mm | 120mm |
| Focal length | 900mm | 840mm |
| Native f/ratio | f/7.5 | f/7.0 |
| Image circle | 44mm | — |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 7.5kg | 10.8kg |
Advantages of Takahashi TSA-120
- Larger image circle (44mm) — supports bigger sensors
- Lighter (7.5kg vs 10.84kg) — easier to travel with
Advantages of Sky-Watcher Esprit 120EDX
- Faster optics at f/7 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 Esprit 120EDX
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
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 Esprit 120EDX — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.46° × 1.64°Scale: 0.92"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.60° × 1.07°Scale: 0.92"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.77° × 0.77°Scale: 0.92"/px
Takahashi TSA-120 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Sky-Watcher Esprit 120EDX — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
