telescopecomparison · 2-way
Askar 107PHQ vs Askar 71F
Askar
107PHQ
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+53% focal length
+51% aperture
Specifications
| Specification | Askar 107PHQ | Askar 71F |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Petzval quintuplet FPL-51 |
| Aperture | 107mm | 71mm |
| Focal length | 749mm | 490mm |
| Native f/ratio | f/7.0 | f/6.9 |
| Image circle | 60mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 7.5kg | 3.2kg |
Advantages of Askar 107PHQ
- Tighter framing — 749mm vs 490mm focal length
- 51% more light-gathering aperture
- Larger image circle (60mm) — supports bigger sensors
Advantages of Askar 71F
- Wider field — 490mm vs 749mm focal length
- Lighter (3.2kg vs 7.5kg) — easier to travel with
Best for — Askar 107PHQ
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — Askar 71F
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Askar 107PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.75° × 1.84°Scale: 1.04"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.80° × 1.20°Scale: 1.04"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.86° × 0.86°Scale: 1.04"/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 107PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Askar 71F — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.