telescope
Sky-Watcher
Esprit 100ED
100mm Triplet APO · 550mm f/5.5
Triplet APO with included field flattener.
Best for
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | Refractor |
| Optical design | Triplet APO |
| Aperture | 100mm |
| Focal length | 550mm |
| Native f/ratio | f/5.5 |
| Image circle | 44mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 8.6kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 3.75° × 2.50°
Scale 1.41″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 2.45° × 1.64°
Scale 1.41″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 1.18° × 1.18°
Scale 1.41″/px
Recommended accessories
- Sky-Watcher Esprit 0.77x Reducerreducer · 0.77× focal lengthmanufacturer supported
- Sky-Watcher Esprit Field Flattenerflattener · 1× focal lengthmanufacturer supported
Typical targets
- NGC NGC 6357 — Lobster NebulaEmission Nebula · 50′
- IC IC 443 — Jellyfish NebulaSupernova Remnant · 50′
- Messier M48 — Open Cluster M48Open Cluster · 54′
- Messier M17 — Omega NebulaEmission Nebula · 46′
- NGC NGC 1893 — Emission Nebula NGC 1893Emission Nebula · 45′
- IC IC 434 — Horsehead NebulaEmission Nebula · 60′
Recommended cameras
28.4mm sensor · 4.78µm px · cooled
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Compare pairing28.3mm sensor · 3.76µm px · cooled
Compare pairing