telescopecomparison · 2-way
Radian Raptor 61 vs ZWO Seestar S50 Pro
ZWO
Seestar S50 Pro
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+6% focal length
+22% aperture
Faster by 0.7 f-stops
Specifications
| Specification | Radian Raptor 61 | ZWO Seestar S50 Pro |
|---|---|---|
| Optics | ||
| Type | refractor | smart-telescope |
| Optical design | Petzval quadruplet | 4-element apochromatic quadruplet with ED glass (folded path) |
| Aperture | 61mm | 50mm |
| Focal length | 275mm | 260mm |
| Native f/ratio | f/4.5 | f/5.2 |
| Image circle | 44mm | — |
| Full-frame support | No | No |
| Physical | ||
| Weight | 2.6kg | 2.8kg |
Advantages of Radian Raptor 61
- 22% more light-gathering aperture
- Faster optics at f/4.5 vs f/5.2
- Larger image circle (44mm) — supports bigger sensors
Advantages of ZWO Seestar S50 Pro
Closely matched on the compared specs.
Best for — Radian Raptor 61
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
Best for — ZWO Seestar S50 Pro
- Wide-field nebulae and Milky Way regions
Radian Raptor 61 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 7.50° × 5.00°Scale: 2.82"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 4.90° × 3.27°Scale: 2.82"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.35° × 2.35°Scale: 2.82"/px
ZWO Seestar S50 Pro — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 7.93° × 5.29°Scale: 2.98"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 5.18° × 3.46°Scale: 2.98"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.49° × 2.49°Scale: 2.98"/px
Radian Raptor 61 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
ZWO Seestar S50 Pro — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
