telescopecomparison · 2-way
Askar 65PHQ vs Askar 71F
Key differences
-15% focal length
-8% aperture
Faster by 0.5 f-stops
Specifications
| Specification | Askar 65PHQ | Askar 71F |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Quintuplet Petzval | Petzval quintuplet FPL-51 |
| Aperture | 65mm | 71mm |
| Focal length | 416mm | 490mm |
| Native f/ratio | f/6.4 | f/6.9 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.6kg | 3.2kg |
Advantages of Askar 65PHQ
- Wider field — 416mm vs 490mm focal length
- Faster optics at f/6.4 vs f/6.9
Advantages of Askar 71F
- Tighter framing — 490mm vs 416mm focal length
Best for — Askar 65PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar 71F
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Askar 65PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.96° × 3.31°Scale: 1.86"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.24° × 2.16°Scale: 1.86"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.56° × 1.56°Scale: 1.86"/px
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 65PHQ — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar 71F — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.