telescopecomparison · 2-way
Astro-Tech AT115EDT vs Sky-Watcher Esprit 120ED
Astro-Tech
AT115EDT
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Sky-Watcher
Esprit 120ED
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Specifications
| Specification | Astro-Tech AT115EDT | Sky-Watcher Esprit 120ED |
|---|---|---|
| Optics | ||
| Type | refractor | Refractor |
| Optical design | Apo triplet FPL-53 | Triplet APO |
| Aperture | 115mm | 120mm |
| Focal length | 805mm | 840mm |
| Native f/ratio | f/7.0 | f/7.0 |
| Image circle | 52mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 6.6kg | 11.5kg |
Advantages of Astro-Tech AT115EDT
- Larger image circle (52mm) — supports bigger sensors
- Lighter (6.6kg vs 11.5kg) — easier to travel with
Advantages of Sky-Watcher Esprit 120ED
Closely matched on the compared specs.
Best for — Astro-Tech AT115EDT
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — Sky-Watcher Esprit 120ED
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Astro-Tech AT115EDT — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.56° × 1.71°Scale: 0.96"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.67° × 1.12°Scale: 0.96"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.80° × 0.80°Scale: 0.96"/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
Astro-Tech AT115EDT — recommended user
Best suited for intermediate imagers building a versatile kit 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.
