telescopecomparison · 2-way
Takahashi Mewlon-210 vs Askar 151PHQ
Takahashi
Mewlon-210
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Askar
151PHQ
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
+128% focal length
+39% aperture
Slower by 4.5 f-stops
Specifications
| Specification | Takahashi Mewlon-210 | Askar 151PHQ |
|---|---|---|
| Optics | ||
| Type | cassegrain | refractor |
| Optical design | Dall-Kirkham | Petzval quintuplet FPL-51 |
| Aperture | 210mm | 151mm |
| Focal length | 2415mm | 1057mm |
| Native f/ratio | f/11.5 | f/7.0 |
| Image circle | — | 60mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 15.5kg | 15.5kg |
Advantages of Takahashi Mewlon-210
- Tighter framing — 2415mm vs 1057mm focal length
- 39% more light-gathering aperture
Advantages of Askar 151PHQ
- Wider field — 1057mm vs 2415mm focal length
- Faster optics at f/7 vs f/11.5
- Larger image circle (60mm) — supports bigger sensors
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 — Askar 151PHQ
- Medium-sized galaxies and planetary nebulae
- 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
Askar 151PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.95° × 1.30°Scale: 0.73"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.27° × 0.85°Scale: 0.73"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.61° × 0.61°Scale: 0.73"/px
Takahashi Mewlon-210 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Askar 151PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.