telescopecomparison · 2-way
Askar 65PHQ vs Askar 80PHQ
Askar
80PHQ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
-31% focal length
-19% aperture
Faster by 1.1 f-stops
Specifications
| Specification | Askar 65PHQ | Askar 80PHQ |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Quintuplet Petzval | Petzval quintuplet FPL-51 |
| Aperture | 65mm | 80mm |
| Focal length | 416mm | 600mm |
| Native f/ratio | f/6.4 | f/7.5 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.6kg | 4.5kg |
Advantages of Askar 65PHQ
- Wider field — 416mm vs 600mm focal length
- Faster optics at f/6.4 vs f/7.5
- Lighter (3.6kg vs 4.5kg) — easier to travel with
Advantages of Askar 80PHQ
- Tighter framing — 600mm vs 416mm focal length
- 23% more light-gathering aperture
Best for — Askar 65PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar 80PHQ
- 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 80PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.44° × 2.29°Scale: 1.29"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.24° × 1.50°Scale: 1.29"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.08° × 1.08°Scale: 1.29"/px
Askar 65PHQ — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar 80PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.