telescopecomparison · 2-way
Sky-Watcher Esprit 120ED vs Sky-Watcher Esprit 150ED
Sky-Watcher
Esprit 120ED
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Sky-Watcher
Esprit 150ED
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
-20% focal length
-20% aperture
Specifications
| Specification | Sky-Watcher Esprit 120ED | Sky-Watcher Esprit 150ED |
|---|---|---|
| Optics | ||
| Type | Refractor | Refractor |
| Optical design | Triplet APO | Triplet APO |
| Aperture | 120mm | 150mm |
| Focal length | 840mm | 1050mm |
| Native f/ratio | f/7.0 | f/7.0 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 11.5kg | 17.0kg |
Advantages of Sky-Watcher Esprit 120ED
- Wider field — 840mm vs 1050mm focal length
- Lighter (11.5kg vs 17kg) — easier to travel with
Advantages of Sky-Watcher Esprit 150ED
- Tighter framing — 1050mm vs 840mm focal length
- 25% more light-gathering aperture
Best for — Sky-Watcher Esprit 120ED
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Esprit 150ED
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
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 150ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.96° × 1.31°Scale: 0.74"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.28° × 0.86°Scale: 0.74"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.62° × 0.62°Scale: 0.74"/px
Sky-Watcher Esprit 120ED — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Sky-Watcher Esprit 150ED — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.