telescopecomparison · 2-way
Takahashi FSQ-85EDX vs Borg 90FL
Takahashi
FSQ-85EDX
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
-10% focal length
-6% aperture
Specifications
| Specification | Takahashi FSQ-85EDX | Borg 90FL |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Petzval APO | Apo doublet fluorite |
| Aperture | 85mm | 90mm |
| Focal length | 450mm | 500mm |
| Native f/ratio | f/5.3 | f/5.6 |
| Image circle | 44mm | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 4.0kg | 2.5kg |
Advantages of Takahashi FSQ-85EDX
- Larger image circle (44mm) — supports bigger sensors
Advantages of Borg 90FL
- Tighter framing — 500mm vs 450mm focal length
- Lighter (2.5kg vs 4kg) — easier to travel with
Best for — Takahashi FSQ-85EDX
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Borg 90FL
- Large emission nebulae and star clusters
Takahashi FSQ-85EDX — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.58° × 3.06°Scale: 1.72"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.99° × 2.00°Scale: 1.72"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.44° × 1.44°Scale: 1.72"/px
Borg 90FL — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.13° × 2.75°Scale: 1.55"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.69° × 1.80°Scale: 1.55"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.29° × 1.29°Scale: 1.55"/px
Takahashi FSQ-85EDX — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Borg 90FL — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.