telescopecomparison · 2-way
Sky-Watcher Esprit 100ED vs Askar 65PHQ
Sky-Watcher
Esprit 100ED
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+32% focal length
+54% aperture
Faster by 0.9 f-stops
Specifications
| Specification | Sky-Watcher Esprit 100ED | Askar 65PHQ |
|---|---|---|
| Optics | ||
| Type | Refractor | Refractor |
| Optical design | Triplet APO | Quintuplet Petzval |
| Aperture | 100mm | 65mm |
| Focal length | 550mm | 416mm |
| Native f/ratio | f/5.5 | f/6.4 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 8.6kg | 3.6kg |
Advantages of Sky-Watcher Esprit 100ED
- Tighter framing — 550mm vs 416mm focal length
- 54% more light-gathering aperture
- Faster optics at f/5.5 vs f/6.4
Advantages of Askar 65PHQ
- Wider field — 416mm vs 550mm focal length
- Lighter (3.6kg vs 8.6kg) — easier to travel with
Best for — Sky-Watcher Esprit 100ED
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar 65PHQ
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Sky-Watcher Esprit 100ED — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.75° × 2.50°Scale: 1.41"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.45° × 1.64°Scale: 1.41"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.18° × 1.18°Scale: 1.41"/px
Askar 65PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.96° × 3.31°Scale: 1.86"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.24° × 2.16°Scale: 1.86"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.56° × 1.56°Scale: 1.86"/px
Sky-Watcher Esprit 100ED — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Askar 65PHQ — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.