telescope
Sky-Watcher
Esprit 80ED
80mm Triplet APO · 400mm f/5.0
Triplet APO with included field flattener.
Best for
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | Refractor |
| Optical design | Triplet APO |
| Aperture | 80mm |
| Focal length | 400mm |
| Native f/ratio | f/5.0 |
| Image circle | 44mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 5.7kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 5.16° × 3.44°
Scale 1.94″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 3.37° × 2.25°
Scale 1.94″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 1.62° × 1.62°
Scale 1.94″/px
Recommended accessories
- Sky-Watcher Esprit Field Flattenerflattener · 1× focal lengthmanufacturer supported
Typical targets
- Messier M33 — Triangulum GalaxyGalaxy · 73′
- IC IC 2944 — Running Chicken NebulaEmission Nebula · 75′
- IC IC 5070 — Pelican NebulaEmission Nebula · 80′
- NGC NGC 2237 — Rosette NebulaEmission Nebula · 80′
- Messier M7 — Ptolemy's ClusterOpen Cluster · 80′
- IC IC 434 — Horsehead NebulaEmission Nebula · 60′
Recommended cameras
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