telescopecomparison · 2-way
Takahashi Mewlon-210 vs Tele Vue NP101is
Takahashi
Mewlon-210
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Tele Vue
NP101is
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
+347% focal length
+108% aperture
Slower by 6.1 f-stops
Specifications
| Specification | Takahashi Mewlon-210 | Tele Vue NP101is |
|---|---|---|
| Optics | ||
| Type | cassegrain | Refractor |
| Optical design | Dall-Kirkham | Petzval |
| Aperture | 210mm | 101mm |
| Focal length | 2415mm | 540mm |
| Native f/ratio | f/11.5 | f/5.4 |
| Image circle | — | 40mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 15.5kg | 4.5kg |
Advantages of Takahashi Mewlon-210
- Tighter framing — 2415mm vs 540mm focal length
- 108% more light-gathering aperture
Advantages of Tele Vue NP101is
- Wider field — 540mm vs 2415mm focal length
- Faster optics at f/5.4 vs f/11.5
- Larger image circle (40mm) — supports bigger sensors
- Lighter (4.5kg vs 15.5kg) — easier to travel with
Best for — Takahashi Mewlon-210
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
Best for — Tele Vue NP101is
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Takahashi Mewlon-210 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 0.85° × 0.57°Scale: 0.32"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.56° × 0.37°Scale: 0.32"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.27° × 0.27°Scale: 0.32"/px
Tele Vue NP101is — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.82° × 2.55°Scale: 1.44"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.49° × 1.67°Scale: 1.44"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.20° × 1.20°Scale: 1.44"/px
Takahashi Mewlon-210 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Tele Vue NP101is — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.