Askar SQA70 – Compact Quintuplet Petzval Astrograph
The Askar SQA70 is a fast, wide-field astrograph designed for crisp, flat images across today’s large sensors. Its quintuplet Petzval optical design (with ED glass) delivers tight, colour-pure stars to the corners—no separate field flattener required. Lightweight, travel-friendly, and purpose-built for deep-sky imaging.
Why astrophotographers love it
- Fast & wide: ~336 mm focal length at around f/4.8 for low-noise, wide-field captures.
- True flat field: Petzval design keeps stars sharp to the edge, ideal for APS-C and full-frame sensors.
- Excellent colour control: ED elements reduce chromatic aberration for clean, high-contrast data.
- Portable build: Compact tube with retractable dew shield; easy to mount and balance.
- Imaging-ready rear end: Robust focuser and common adapter threads for straightforward camera hookup.
What it’s great for
- Large nebulae, Milky Way star fields, dark-nebula complexes
- Wide mosaics and fast survey projects
- Travel rigs where size, speed, and field flatness matter
Technical summary
| Optical design | Quintuplet Petzval (ED glass, native flat field) | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Aperture | 70 mm | ||||||||||||||||||||||||||||||||||||||||||||||||
| Focal length / Ratio | ≈ 336 mm | f/4.8 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Image circle | Full-frame compatible (flat, corrected field) | ||||||||||||||||||||||||||||||||||||||||||||||||
| Focuser | Precision rack-and-pinion, dual-speed (imaging grade) | ||||||||||||||||||||||||||||||||||||||||||||||||
| Tube length |
Product introduction  
  
             Specifications
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