telescopecomparison · 2-way
Askar 71F vs Askar SQA85
Key differences
-16% aperture
Slower by 1.1 f-stops
Specifications
| Specification | Askar 71F | Askar SQA85 |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Quadruplet astrograph FPL-51 |
| Aperture | 71mm | 85mm |
| Focal length | 490mm | 500mm |
| Native f/ratio | f/6.9 | f/5.8 |
| Image circle | 44mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.2kg | 4.4kg |
Advantages of Askar 71F
- Lighter (3.2kg vs 4.4kg) — easier to travel with
Advantages of Askar SQA85
- 20% more light-gathering aperture
- Faster optics at f/5.8 vs f/6.9
- Larger image circle (52mm) — supports bigger sensors
Best for — Askar 71F
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar SQA85
- 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
Askar SQA85 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.13° × 2.75°Scale: 1.55"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.69° × 1.80°Scale: 1.55"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.29° × 1.29°Scale: 1.55"/px
Askar 71F — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar SQA85 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.