telescopecomparison · 2-way
Takahashi Epsilon-180ED vs William Optics Pleiades 111
Takahashi
Epsilon-180ED
Best suited for beginners and wide-field enthusiasts running a permanent observatory setup.
William Optics
Pleiades 111
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-5% focal length
+62% aperture
Faster by 2.0 f-stops
Specifications
| Specification | Takahashi Epsilon-180ED | William Optics Pleiades 111 |
|---|---|---|
| Optics | ||
| Type | astrograph | astrograph |
| Optical design | Hyperbolic Newtonian | Astrograph (7-element) |
| Aperture | 180mm | 111mm |
| Focal length | 500mm | 528mm |
| Native f/ratio | f/2.8 | f/4.8 |
| Image circle | 44mm | 45mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 12.5kg | 8.0kg |
Advantages of Takahashi Epsilon-180ED
- 62% more light-gathering aperture
- Faster optics at f/2.8 vs f/4.8
Advantages of William Optics Pleiades 111
- Lighter (7.95kg vs 12.5kg) — easier to travel with
Best for — Takahashi Epsilon-180ED
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Best for — William Optics Pleiades 111
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Takahashi Epsilon-180ED — 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
William Optics Pleiades 111 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.91° × 2.60°Scale: 1.47"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.55° × 1.70°Scale: 1.47"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.23° × 1.23°Scale: 1.47"/px
Takahashi Epsilon-180ED — recommended user
Best suited for beginners and wide-field enthusiasts running a permanent observatory setup.
William Optics Pleiades 111 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
