telescope
William Optics
Pleiades 111
111mm Astrograph (7-element) · 528mm f/4.8
Fast 7-element astrograph.
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Product specifications can change. Please verify specifications and compatibility with the manufacturer or retailer before purchasing.
Best for
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | astrograph |
| Optical design | Astrograph (7-element) |
| Aperture | 111mm |
| Focal length | 528mm |
| Native f/ratio | f/4.8 |
| Image circle | 45mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 8.0kg |
Typical FOV & image 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
Typical targets
- M48 — Open Cluster M48Open Cluster · 54′Plan this target
- NGC 6357 — Lobster NebulaEmission Nebula · 50′Plan this target
- IC 443 — Jellyfish NebulaSupernova Remnant · 50′Plan this target
- Sh2-155 — Cave NebulaEmission Nebula · 50′Plan this target
- IC 434 — Horsehead NebulaEmission Nebula · 60′Plan this target
- NGC 869/884 — Double ClusterOpen Cluster · 60′Plan this target
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Source: williamoptics.com