telescopecomparison · 2-way
Askar FRA400 vs Askar SQA106
Askar
SQA106
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-31% focal length
-32% aperture
Specifications
| Specification | Askar FRA400 | Askar SQA106 |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Petzval Quintuplet APO | Quadruplet astrograph FPL-51 |
| Aperture | 72mm | 106mm |
| Focal length | 400mm | 580mm |
| Native f/ratio | f/5.6 | f/5.5 |
| Image circle | 44mm | 60mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 3.9kg | 6.5kg |
Advantages of Askar FRA400
- Wider field — 400mm vs 580mm focal length
- Lighter (3.9kg vs 6.5kg) — easier to travel with
Advantages of Askar SQA106
- Tighter framing — 580mm vs 400mm focal length
- 47% more light-gathering aperture
- Larger image circle (60mm) — supports bigger sensors
Best for — Askar FRA400
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Askar SQA106
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Askar FRA400 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 5.16° × 3.44°Scale: 1.94"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 3.37° × 2.25°Scale: 1.94"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.62° × 1.62°Scale: 1.94"/px
Askar SQA106 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.56° × 2.37°Scale: 1.34"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.32° × 1.55°Scale: 1.34"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.12° × 1.12°Scale: 1.34"/px
Askar FRA400 — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Askar SQA106 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.