telescopecomparison · 2-way
Celestron EdgeHD 14 vs Celestron RASA 14
Celestron
EdgeHD 14
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Celestron
RASA 14
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
+395% focal length
Slower by 8.8 f-stops
Specifications
| Specification | Celestron EdgeHD 14 | Celestron RASA 14 |
|---|---|---|
| Optics | ||
| Type | sct | astrograph |
| Optical design | Aplanatic SCT | Rowe-Ackermann Schmidt Astrograph |
| Aperture | 356mm | 356mm |
| Focal length | 3910mm | 790mm |
| Native f/ratio | f/11.0 | f/2.2 |
| Image circle | 42mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 20.0kg | 30.0kg |
Advantages of Celestron EdgeHD 14
- Tighter framing — 3910mm vs 790mm focal length
- Lighter (20kg vs 30kg) — easier to travel with
Advantages of Celestron RASA 14
- Wider field — 790mm vs 3910mm focal length
- Faster optics at f/2.22 vs f/11
- Larger image circle (52mm) — supports bigger sensors
Best for — Celestron EdgeHD 14
- 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 — Celestron RASA 14
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Celestron EdgeHD 14 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 0.53° × 0.35°Scale: 0.20"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.34° × 0.23°Scale: 0.20"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.17° × 0.17°Scale: 0.20"/px
Celestron RASA 14 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.61° × 1.74°Scale: 0.98"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.70° × 1.14°Scale: 0.98"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.82° × 0.82°Scale: 0.98"/px
Celestron EdgeHD 14 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Celestron RASA 14 — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.