telescopecomparison · 2-way
William Optics RedCat 61 vs Vaonis Vespera Pro
William Optics
RedCat 61
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Vaonis
Vespera Pro
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Key differences
+20% focal length
+22% aperture
Specifications
| Specification | William Optics RedCat 61 | Vaonis Vespera Pro |
|---|---|---|
| Optics | ||
| Type | Refractor | smart-telescope |
| Optical design | Petzval APO | Apo quadruplet all-in-one |
| Aperture | 61mm | 50mm |
| Focal length | 300mm | 250mm |
| Native f/ratio | f/4.9 | f/5.0 |
| Image circle | 45mm | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 2.0kg | 5.5kg |
Advantages of William Optics RedCat 61
- Tighter framing — 300mm vs 250mm focal length
- 22% more light-gathering aperture
- Larger image circle (45mm) — supports bigger sensors
- Lighter (2kg vs 5.5kg) — easier to travel with
Advantages of Vaonis Vespera Pro
- Wider field — 250mm vs 300mm focal length
Best for — William Optics RedCat 61
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Best for — Vaonis Vespera Pro
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
William Optics RedCat 61 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 6.88° × 4.58°Scale: 2.59"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 4.49° × 3.00°Scale: 2.59"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.16° × 2.16°Scale: 2.59"/px
Vaonis Vespera Pro — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 8.25° × 5.50°Scale: 3.10"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 5.39° × 3.60°Scale: 3.10"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.59° × 2.59°Scale: 3.10"/px
William Optics RedCat 61 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Vaonis Vespera Pro — recommended user
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.