telescopecomparison · 2-way
Celestron EdgeHD 9.25 vs Sky-Watcher Esprit 100ED
Celestron
EdgeHD 9.25
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Sky-Watcher
Esprit 100ED
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+327% focal length
+135% aperture
Slower by 4.5 f-stops
Specifications
| Specification | Celestron EdgeHD 9.25 | Sky-Watcher Esprit 100ED |
|---|---|---|
| Optics | ||
| Type | SCT | Refractor |
| Optical design | Aplanatic SCT | Triplet APO |
| Aperture | 235mm | 100mm |
| Focal length | 2350mm | 550mm |
| Native f/ratio | f/10.0 | f/5.5 |
| Image circle | 42mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 9.5kg | 8.6kg |
Advantages of Celestron EdgeHD 9.25
- Tighter framing — 2350mm vs 550mm focal length
- 135% more light-gathering aperture
Advantages of Sky-Watcher Esprit 100ED
- Wider field — 550mm vs 2350mm focal length
- Faster optics at f/5.5 vs f/10
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 — Sky-Watcher Esprit 100ED
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
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
Sky-Watcher Esprit 100ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.75° × 2.50°Scale: 1.41"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.45° × 1.64°Scale: 1.41"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.18° × 1.18°Scale: 1.41"/px
Celestron EdgeHD 9.25 — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Sky-Watcher Esprit 100ED — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.