telescopecomparison · 2-way
Celestron EdgeHD 8 vs Askar SQA106
Celestron
EdgeHD 8
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Askar
SQA106
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+250% focal length
+92% aperture
Slower by 4.5 f-stops
Specifications
| Specification | Celestron EdgeHD 8 | Askar SQA106 |
|---|---|---|
| Optics | ||
| Type | SCT | refractor |
| Optical design | Aplanatic SCT | Quadruplet astrograph FPL-51 |
| Aperture | 203mm | 106mm |
| Focal length | 2032mm | 580mm |
| Native f/ratio | f/10.0 | f/5.5 |
| Image circle | 42mm | 60mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 6.4kg | 6.5kg |
Advantages of Celestron EdgeHD 8
- Tighter framing — 2032mm vs 580mm focal length
- 92% more light-gathering aperture
Advantages of Askar SQA106
- Wider field — 580mm vs 2032mm focal length
- Faster optics at f/5.5 vs f/10
- Larger image circle (60mm) — 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 — Askar SQA106
- Large emission nebulae and star clusters
- 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
Askar SQA106 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.56° × 2.37°Scale: 1.34"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.32° × 1.55°Scale: 1.34"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.12° × 1.12°Scale: 1.34"/px
Celestron EdgeHD 8 — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Askar SQA106 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.