telescopecomparison · 2-way
Celestron EdgeHD 9.25 vs Takahashi Mewlon-210
Celestron
EdgeHD 9.25
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Takahashi
Mewlon-210
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Key differences
+12% aperture
Faster by 1.5 f-stops
Specifications
| Specification | Celestron EdgeHD 9.25 | Takahashi Mewlon-210 |
|---|---|---|
| Optics | ||
| Type | SCT | cassegrain |
| Optical design | Aplanatic SCT | Dall-Kirkham |
| Aperture | 235mm | 210mm |
| Focal length | 2350mm | 2415mm |
| Native f/ratio | f/10.0 | f/11.5 |
| Image circle | 42mm | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 9.5kg | 15.5kg |
Advantages of Celestron EdgeHD 9.25
- 12% more light-gathering aperture
- Faster optics at f/10 vs f/11.5
- Larger image circle (42mm) — supports bigger sensors
- Lighter (9.5kg vs 15.5kg) — easier to travel with
Advantages of Takahashi Mewlon-210
Closely matched on the compared specs.
Best for — Celestron EdgeHD 9.25
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Best for — Takahashi Mewlon-210
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
Celestron EdgeHD 9.25 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 0.88° × 0.59°Scale: 0.33"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.57° × 0.38°Scale: 0.33"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.28° × 0.28°Scale: 0.33"/px
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
Celestron EdgeHD 9.25 — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Takahashi Mewlon-210 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.