telescopecomparison · 2-way
Askar 71F vs ZWO FF70 APO
Specifications
| Specification | Askar 71F | ZWO FF70 APO |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Apo quadruplet ED |
| Aperture | 71mm | 70mm |
| Focal length | 490mm | 490mm |
| Native f/ratio | f/6.9 | f/7.0 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.2kg | 2.5kg |
Advantages of Askar 71F
Closely matched on the compared specs.
Advantages of ZWO FF70 APO
- Lighter (2.5kg vs 3.2kg) — easier to travel with
Best for — Askar 71F
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — ZWO FF70 APO
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Askar 71F — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.21° × 2.81°Scale: 1.58"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.75° × 1.84°Scale: 1.58"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.32° × 1.32°Scale: 1.58"/px
ZWO FF70 APO — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.21° × 2.81°Scale: 1.58"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.75° × 1.84°Scale: 1.58"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.32° × 1.32°Scale: 1.58"/px
Askar 71F — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
ZWO FF70 APO — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
