telescopecomparison · 2-way
Askar 151PHQ vs William Optics FLT 156
Askar
151PHQ
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
William Optics
FLT 156
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Specifications
| Specification | Askar 151PHQ | William Optics FLT 156 |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Apo triplet FPL-53 |
| Aperture | 151mm | 156mm |
| Focal length | 1057mm | 1085mm |
| Native f/ratio | f/7.0 | f/7.0 |
| Image circle | 60mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 15.5kg | 11.5kg |
Advantages of Askar 151PHQ
- Larger image circle (60mm) — supports bigger sensors
Advantages of William Optics FLT 156
- Lighter (11.5kg vs 15.5kg) — easier to travel with
Best for — Askar 151PHQ
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — William Optics FLT 156
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Askar 151PHQ — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.95° × 1.30°Scale: 0.73"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.27° × 0.85°Scale: 0.73"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.61° × 0.61°Scale: 0.73"/px
William Optics FLT 156 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.90° × 1.27°Scale: 0.71"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.24° × 0.83°Scale: 0.71"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.60° × 0.60°Scale: 0.71"/px
Askar 151PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
William Optics FLT 156 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.