telescopecomparison · 2-way
Askar 65PHQ vs Radian Raptor 75
Key differences
-13% aperture
Slower by 1.0 f-stops
Specifications
| Specification | Askar 65PHQ | Radian Raptor 75 |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Quintuplet Petzval | Petzval quintuplet |
| Aperture | 65mm | 75mm |
| Focal length | 416mm | 405mm |
| Native f/ratio | f/6.4 | f/5.4 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.6kg | 4.5kg |
Advantages of Askar 65PHQ
- Lighter (3.6kg vs 4.5kg) — easier to travel with
Advantages of Radian Raptor 75
- 15% more light-gathering aperture
- Faster optics at f/5.4 vs f/6.4
Best for — Askar 65PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Radian Raptor 75
- 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
Radian Raptor 75 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 5.09° × 3.40°Scale: 1.91"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.32° × 2.22°Scale: 1.91"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.60° × 1.60°Scale: 1.91"/px
Askar 65PHQ — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Radian Raptor 75 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.