telescopecomparison · 2-way
Takahashi TSA-120 vs Takahashi Epsilon-130D
Takahashi
TSA-120
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Takahashi
Epsilon-130D
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Key differences
+109% focal length
-8% aperture
Slower by 4.2 f-stops
Specifications
| Specification | Takahashi TSA-120 | Takahashi Epsilon-130D |
|---|---|---|
| Optics | ||
| Type | Refractor | astrograph |
| Optical design | Triplet APO | Hyperbolic Newtonian |
| Aperture | 120mm | 130mm |
| Focal length | 900mm | 430mm |
| Native f/ratio | f/7.5 | f/3.3 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 7.5kg | 7.8kg |
Advantages of Takahashi TSA-120
- Tighter framing — 900mm vs 430mm focal length
Advantages of Takahashi Epsilon-130D
- Wider field — 430mm vs 900mm focal length
- Faster optics at f/3.3 vs f/7.5
Best for — Takahashi TSA-120
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — Takahashi Epsilon-130D
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- 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
Takahashi Epsilon-130D — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.80° × 3.20°Scale: 1.80"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.13° × 2.09°Scale: 1.80"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.51° × 1.51°Scale: 1.80"/px
Takahashi TSA-120 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Takahashi Epsilon-130D — recommended user
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.