telescopecomparison · 2-way
Askar 151PHQ vs Astro-Tech AT115EDT
Askar
151PHQ
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Astro-Tech
AT115EDT
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+31% focal length
+31% aperture
Specifications
| Specification | Askar 151PHQ | Astro-Tech AT115EDT |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Apo triplet FPL-53 |
| Aperture | 151mm | 115mm |
| Focal length | 1057mm | 805mm |
| Native f/ratio | f/7.0 | f/7.0 |
| Image circle | 60mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 15.5kg | 6.6kg |
Advantages of Askar 151PHQ
- Tighter framing — 1057mm vs 805mm focal length
- 31% more light-gathering aperture
- Larger image circle (60mm) — supports bigger sensors
Advantages of Astro-Tech AT115EDT
- Wider field — 805mm vs 1057mm focal length
- Lighter (6.6kg 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 — Astro-Tech AT115EDT
- 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
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
Askar 151PHQ — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Astro-Tech AT115EDT — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
