telescopecomparison · 2-way
Sky-Watcher Esprit 80ED vs Sky-Watcher Esprit 120ED
Sky-Watcher
Esprit 80ED
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Sky-Watcher
Esprit 120ED
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-52% focal length
-33% aperture
Faster by 2.0 f-stops
Specifications
| Specification | Sky-Watcher Esprit 80ED | Sky-Watcher Esprit 120ED |
|---|---|---|
| Optics | ||
| Type | Refractor | Refractor |
| Optical design | Triplet APO | Triplet APO |
| Aperture | 80mm | 120mm |
| Focal length | 400mm | 840mm |
| Native f/ratio | f/5.0 | f/7.0 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 5.7kg | 11.5kg |
Advantages of Sky-Watcher Esprit 80ED
- Wider field — 400mm vs 840mm focal length
- Faster optics at f/5 vs f/7
- Lighter (5.7kg vs 11.5kg) — easier to travel with
Advantages of Sky-Watcher Esprit 120ED
- Tighter framing — 840mm vs 400mm focal length
- 50% more light-gathering aperture
Best for — Sky-Watcher Esprit 80ED
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Esprit 120ED
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Sky-Watcher Esprit 80ED — typical FOV & 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
Sky-Watcher Esprit 120ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.46° × 1.64°Scale: 0.92"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.60° × 1.07°Scale: 0.92"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.77° × 0.77°Scale: 0.92"/px
Sky-Watcher Esprit 80ED — recommended user
Best suited for beginners and wide-field enthusiasts running a backyard imaging setup.
Sky-Watcher Esprit 120ED — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.