telescopecomparison · 2-way
Askar FRA400 vs Askar 65PHQ
Key differences
+11% aperture
Faster by 0.8 f-stops
Specifications
| Specification | Askar FRA400 | Askar 65PHQ |
|---|---|---|
| Optics | ||
| Type | Refractor | Refractor |
| Optical design | Petzval Quintuplet APO | Quintuplet Petzval |
| Aperture | 72mm | 65mm |
| Focal length | 400mm | 416mm |
| Native f/ratio | f/5.6 | f/6.4 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.9kg | 3.6kg |
Advantages of Askar FRA400
- 11% more light-gathering aperture
- Faster optics at f/5.6 vs f/6.4
Advantages of Askar 65PHQ
Closely matched on the compared specs.
Best for — Askar FRA400
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar 65PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Askar FRA400 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 5.16° × 3.44°Scale: 1.94"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.37° × 2.25°Scale: 1.94"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.62° × 1.62°Scale: 1.94"/px
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 FRA400 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar 65PHQ — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.