telescopecomparison · 2-way
Celestron EdgeHD 8 vs Takahashi FSQ-106EDX4
Celestron
EdgeHD 8
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Takahashi
FSQ-106EDX4
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+283% focal length
+92% aperture
Slower by 5.0 f-stops
Specifications
| Specification | Celestron EdgeHD 8 | Takahashi FSQ-106EDX4 |
|---|---|---|
| Optics | ||
| Type | SCT | Refractor |
| Optical design | Aplanatic SCT | Petzval APO |
| Aperture | 203mm | 106mm |
| Focal length | 2032mm | 530mm |
| Native f/ratio | f/10.0 | f/5.0 |
| Image circle | 42mm | 88mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 6.4kg | 7.5kg |
Advantages of Celestron EdgeHD 8
- Tighter framing — 2032mm vs 530mm focal length
- 92% more light-gathering aperture
Advantages of Takahashi FSQ-106EDX4
- Wider field — 530mm vs 2032mm focal length
- Faster optics at f/5 vs f/10
- Larger image circle (88mm) — supports bigger sensors
Best for — Celestron EdgeHD 8
- 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 FSQ-106EDX4
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Celestron EdgeHD 8 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.02° × 0.68°Scale: 0.38"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.66° × 0.44°Scale: 0.38"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.32° × 0.32°Scale: 0.38"/px
Takahashi FSQ-106EDX4 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.89° × 2.59°Scale: 1.46"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.54° × 1.70°Scale: 1.46"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.22° × 1.22°Scale: 1.46"/px
Celestron EdgeHD 8 — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Takahashi FSQ-106EDX4 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.