telescopecomparison · 2-way
Askar 60F vs William Optics RedCat 61 WIFD
William Optics
RedCat 61 WIFD
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+36% focal length
Slower by 1.9 f-stops
Specifications
| Specification | Askar 60F | William Optics RedCat 61 WIFD |
|---|---|---|
| Optics | ||
| Type | Refractor | Refractor |
| Optical design | Quadruplet Petzval | Petzval APO |
| Aperture | 60mm | 61mm |
| Focal length | 408mm | 300mm |
| Native f/ratio | f/6.8 | f/4.9 |
| Image circle | 44mm | 45mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 2.5kg | 2.0kg |
Advantages of Askar 60F
- Tighter framing — 408mm vs 300mm focal length
Advantages of William Optics RedCat 61 WIFD
- Wider field — 300mm vs 408mm focal length
- Faster optics at f/4.9 vs f/6.8
- Lighter (2kg vs 2.5kg) — easier to travel with
Best for — Askar 60F
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — William Optics RedCat 61 WIFD
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Askar 60F — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 5.06° × 3.37°Scale: 1.90"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.30° × 2.20°Scale: 1.90"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.59° × 1.59°Scale: 1.90"/px
William Optics RedCat 61 WIFD — 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
Askar 60F — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
William Optics RedCat 61 WIFD — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
