telescopecomparison · 2-way
Astro-Tech AT12RC vs Celestron EdgeHD 11
Astro-Tech
AT12RC
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Celestron
EdgeHD 11
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Key differences
-13% focal length
+9% aperture
Faster by 2.0 f-stops
Specifications
| Specification | Astro-Tech AT12RC | Celestron EdgeHD 11 |
|---|---|---|
| Optics | ||
| Type | ritchey-chretien | sct |
| Optical design | Truss Ritchey-Chrétien | Aplanatic SCT |
| Aperture | 305mm | 279mm |
| Focal length | 2432mm | 2800mm |
| Native f/ratio | f/8.0 | f/10.0 |
| Image circle | — | 42mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 26.5kg | 12.7kg |
Advantages of Astro-Tech AT12RC
- Wider field — 2432mm vs 2800mm focal length
- Faster optics at f/8 vs f/10
Advantages of Celestron EdgeHD 11
- Tighter framing — 2800mm vs 2432mm focal length
- Larger image circle (42mm) — supports bigger sensors
- Lighter (12.7kg vs 26.5kg) — easier to travel with
Best for — Astro-Tech AT12RC
- 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 EdgeHD 11
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Astro-Tech AT12RC — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 0.85° × 0.57°Scale: 0.32"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.55° × 0.37°Scale: 0.32"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.27° × 0.27°Scale: 0.32"/px
Celestron EdgeHD 11 — 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
Astro-Tech AT12RC — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.
Celestron EdgeHD 11 — recommended user
Best suited for experienced imagers chasing detail running a permanent observatory setup.