telescopecomparison · 2-way
Takahashi Mewlon-210 vs William Optics FLT 120
Takahashi
Mewlon-210
Best suited for experienced imagers chasing detail running a permanent observatory setup.
William Optics
FLT 120
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+210% focal length
+75% aperture
Slower by 5.0 f-stops
Specifications
| Specification | Takahashi Mewlon-210 | William Optics FLT 120 |
|---|---|---|
| Optics | ||
| Type | cassegrain | Refractor |
| Optical design | Dall-Kirkham | Triplet APO |
| Aperture | 210mm | 120mm |
| Focal length | 2415mm | 780mm |
| Native f/ratio | f/11.5 | f/6.5 |
| Image circle | — | 44mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 15.5kg | 7.7kg |
Advantages of Takahashi Mewlon-210
- Tighter framing — 2415mm vs 780mm focal length
- 75% more light-gathering aperture
Advantages of William Optics FLT 120
- Wider field — 780mm vs 2415mm focal length
- Faster optics at f/6.5 vs f/11.5
- Larger image circle (44mm) — supports bigger sensors
- Lighter (7.7kg 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 — William Optics FLT 120
- 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
William Optics FLT 120 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.64° × 1.76°Scale: 0.99"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.73° × 1.15°Scale: 0.99"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.83° × 0.83°Scale: 0.99"/px
Takahashi Mewlon-210 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.
William Optics FLT 120 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
