telescopecomparison · 2-way
TS-Optics UNC 254 f/4 Newtonian Astrograph vs Sky-Watcher Esprit 150ED
TS-Optics
UNC 254 f/4 Newtonian Astrograph
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Sky-Watcher
Esprit 150ED
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
+69% aperture
Faster by 3.0 f-stops
Specifications
| Specification | TS-Optics UNC 254 f/4 Newtonian Astrograph | Sky-Watcher Esprit 150ED |
|---|---|---|
| Optics | ||
| Type | newtonian | Refractor |
| Optical design | Newtonian astrograph | Triplet APO |
| Aperture | 254mm | 150mm |
| Focal length | 1016mm | 1050mm |
| Native f/ratio | f/4.0 | f/7.0 |
| Image circle | — | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 14.0kg | 17.0kg |
Advantages of TS-Optics UNC 254 f/4 Newtonian Astrograph
- 69% more light-gathering aperture
- Faster optics at f/4 vs f/7
- Lighter (14kg vs 17kg) — easier to travel with
Advantages of Sky-Watcher Esprit 150ED
- Larger image circle (44mm) — supports bigger sensors
Best for — TS-Optics UNC 254 f/4 Newtonian Astrograph
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Esprit 150ED
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
TS-Optics UNC 254 f/4 Newtonian Astrograph — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.03° × 1.35°Scale: 0.76"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.33° × 0.89°Scale: 0.76"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.64° × 0.64°Scale: 0.76"/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
TS-Optics UNC 254 f/4 Newtonian Astrograph — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Sky-Watcher Esprit 150ED — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
