telescopecomparison · 2-way
Celestron RASA 6 vs Unistellar Odyssey
Unistellar
Odyssey
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+79% aperture
Faster by 1.7 f-stops
Specifications
| Specification | Celestron RASA 6 | Unistellar Odyssey |
|---|---|---|
| Optics | ||
| Type | astrograph | smart-telescope |
| Optical design | Rowe-Ackermann Schmidt Astrograph | Newtonian reflector all-in-one |
| Aperture | 152mm | 85mm |
| Focal length | 335mm | 320mm |
| Native f/ratio | f/2.2 | f/3.9 |
| Image circle | 16mm | — |
| Full-frame support | No | No |
| Physical | ||
| Weight | 3.8kg | 4.0kg |
Advantages of Celestron RASA 6
- 79% more light-gathering aperture
- Faster optics at f/2.2 vs f/3.9
- Larger image circle (16mm) — supports bigger sensors
Advantages of Unistellar Odyssey
Closely matched on the compared specs.
Best for — Celestron RASA 6
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
Best for — Unistellar Odyssey
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
Celestron RASA 6 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 6.16° × 4.11°Scale: 2.32"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 4.02° × 2.69°Scale: 2.32"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.93° × 1.93°Scale: 2.32"/px
Unistellar Odyssey — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 6.45° × 4.30°Scale: 2.42"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 4.21° × 2.81°Scale: 2.42"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.02° × 2.02°Scale: 2.42"/px
Celestron RASA 6 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Unistellar Odyssey — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
