telescopecomparison · 2-way
Celestron C9.25 SCT vs Celestron EdgeHD 1100
Celestron
C9.25 SCT
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Celestron
EdgeHD 1100
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Key differences
-16% focal length
-16% aperture
Specifications
| Specification | Celestron C9.25 SCT | Celestron EdgeHD 1100 |
|---|---|---|
| Optics | ||
| Type | sct | sct |
| Optical design | Schmidt-Cassegrain | Aplanatic SCT |
| Aperture | 235mm | 279mm |
| Focal length | 2350mm | 2800mm |
| Native f/ratio | f/10.0 | f/10.0 |
| Image circle | — | 42mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 9.5kg | 12.7kg |
Advantages of Celestron C9.25 SCT
- Wider field — 2350mm vs 2800mm focal length
- Lighter (9.5kg vs 12.7kg) — easier to travel with
Advantages of Celestron EdgeHD 1100
- Tighter framing — 2800mm vs 2350mm focal length
- 19% more light-gathering aperture
- Larger image circle (42mm) — supports bigger sensors
Best for — Celestron C9.25 SCT
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
Best for — Celestron EdgeHD 1100
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Celestron C9.25 SCT — 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
Celestron EdgeHD 1100 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 0.74° × 0.49°Scale: 0.28"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.48° × 0.32°Scale: 0.28"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.23° × 0.23°Scale: 0.28"/px
Celestron C9.25 SCT — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Celestron EdgeHD 1100 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.
