telescopecomparison · 2-way
William Optics Pleiades 68 vs Borg 55FL
William Optics
Pleiades 68
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+24% aperture
Faster by 0.7 f-stops
Specifications
| Specification | William Optics Pleiades 68 | Borg 55FL |
|---|---|---|
| Optics | ||
| Type | astrograph | refractor |
| Optical design | Astrograph (7-element) | Apo doublet fluorite |
| Aperture | 68mm | 55mm |
| Focal length | 260mm | 250mm |
| Native f/ratio | f/3.8 | f/4.5 |
| Image circle | 48mm | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 3.0kg | 1.2kg |
Advantages of William Optics Pleiades 68
- 24% more light-gathering aperture
- Faster optics at f/3.8 vs f/4.5
- Larger image circle (48mm) — supports bigger sensors
Advantages of Borg 55FL
- Lighter (1.2kg vs 2.98kg) — easier to travel with
Best for — William Optics Pleiades 68
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Best for — Borg 55FL
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
William Optics Pleiades 68 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 7.93° × 5.29°Scale: 2.98"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 5.18° × 3.46°Scale: 2.98"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.49° × 2.49°Scale: 2.98"/px
Borg 55FL — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 8.25° × 5.50°Scale: 3.10"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 5.39° × 3.60°Scale: 3.10"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 2.59° × 2.59°Scale: 3.10"/px
William Optics Pleiades 68 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Borg 55FL — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
