telescopecomparison · 2-way
Askar 107PHQ vs Borg 107FL
Askar
107PHQ
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Borg
107FL
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
+25% focal length
Slower by 1.4 f-stops
Specifications
| Specification | Askar 107PHQ | Borg 107FL |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Apo doublet fluorite |
| Aperture | 107mm | 107mm |
| Focal length | 749mm | 600mm |
| Native f/ratio | f/7.0 | f/5.6 |
| Image circle | 44mm | — |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 7.5kg | 3.5kg |
Advantages of Askar 107PHQ
- Tighter framing — 749mm vs 600mm focal length
- Larger image circle (43.9mm) — supports bigger sensors
Advantages of Borg 107FL
- Wider field — 600mm vs 749mm focal length
- Faster optics at f/5.6 vs f/7
- Lighter (3.5kg 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 — Borg 107FL
- 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
Borg 107FL — 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 107PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Borg 107FL — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.