Askar PHQ65 – Quintuplet Flat-Field APO Refractor
The Askar PHQ65 is a premium quintuplet APO refractor engineered for astrophotography. Its flat-field optical design means no separate flattener is required—making setup simple while delivering pinpoint stars across APS-C and full-frame sensors.
Key features
- Aperture: 65 mm with a high-quality APO quintuplet design.
- Flat field: Built-in correction—no extra flattener needed.
- Focal length: 416 mm at f/6.4, perfect for nebulae and clusters.
- ED elements: Suppresses chromatic aberration for sharp, colour-pure images.
- Portable: Compact OTA with retractable dew shield for travel rigs.
- Imaging ready: Sturdy rack-and-pinion focuser with dual-speed control.
Technical summary
| Optical design | Quintuplet APO with flat field |
|---|---|
| Aperture | 65 mm |
| Focal length | 416 mm |
| Focal ratio | f/6.4 |
| Image circle | Full-frame compatible |
| Focuser | 2.5″ rack-and-pinion, dual-speed |
| Weight (OTA) | ~3.9 kg |
| Included | OTA, tube rings, dovetail, adapters |
Best for
- Wide-field astrophotography with APS-C and full-frame sensors
- Travelling astrophotographers who want a compact yet powerful APO
- Large nebulae, clusters, and Milky Way fields