The ASKAR 80PHQ refractor telescope user manual provides specifications, setup steps, safety warnings, and accessory connection details.
This manual introduces the ASKAR 80PHQ, a compact medium‑focal‑ratio refractor telescope with an 80 mm aperture, 600 mm focal length and f/7.5 focal ratio. It describes the optical design, mechanical dimensions, and the included accessories such as tube rings, a Vixen dovetail plate and a four‑piece adapter set.
The guide also covers safe operation (including a warning against direct solar observation), detailed accessory connection limits, and step‑by‑step instructions for assembling, focusing, and attaching cameras or filters. Technical data and part diagrams are provided for reference. This manual is written in Chinese.
| Aperture size | 80 mm |
|---|---|
| Focal length | 600 mm |
| Focal ratio | f/7.5 |
| Objective lens | Quadruplet air‑spaced APO (including two ED glass) |
| Image circle | 44 mm |
| Total length (collapsed) | 450 mm |
| Net weight | 3.9 kg |
| Gross weight | 4.7 kg |
| Rear‑end thread types | M76×1, M68×1, M54×0.75, M48×0.75 (filter thread inside) |
No. The manual warns not to look at the Sun directly with the telescope because it can cause instant blindness; a dedicated solar filter must be used.
The maximum back‑focus distance is 115 mm for the M48×0.75 thread, 135 mm for M54×0.75, 155 mm for M68×1, and 168.5 mm for M76×1.