telescopecomparison · 2-way
Celestron EdgeHD 9.25 vs Borg 107FL
Celestron
EdgeHD 9.25
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Borg
107FL
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
+292% focal length
+120% aperture
Slower by 4.4 f-stops
Specifications
| Specification | Celestron EdgeHD 9.25 | Borg 107FL |
|---|---|---|
| Optics | ||
| Type | SCT | refractor |
| Optical design | Aplanatic SCT | Apo doublet fluorite |
| Aperture | 235mm | 107mm |
| Focal length | 2350mm | 600mm |
| Native f/ratio | f/10.0 | f/5.6 |
| Image circle | 42mm | — |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 9.5kg | 3.5kg |
Advantages of Celestron EdgeHD 9.25
- Tighter framing — 2350mm vs 600mm focal length
- 120% more light-gathering aperture
- Larger image circle (42mm) — supports bigger sensors
Advantages of Borg 107FL
- Wider field — 600mm vs 2350mm focal length
- Faster optics at f/5.6 vs f/10
- Lighter (3.5kg vs 9.5kg) — easier to travel with
Best for — Celestron EdgeHD 9.25
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Best for — Borg 107FL
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Celestron EdgeHD 9.25 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 0.88° × 0.59°Scale: 0.33"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.57° × 0.38°Scale: 0.33"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.28° × 0.28°Scale: 0.33"/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
Celestron EdgeHD 9.25 — recommended user
Best suited for experienced imagers chasing detail running a backyard imaging setup.
Borg 107FL — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.