OTA · 2021–
Askar FRA600
Key specifications
| Aperture | 108 mm |
|---|---|
| Focal length | 600 mm |
| Focal ratio | f/5.6 |
| Optical design | Other |
| Back focus | 160 mm |
| Weight | 6.5 kg |
All specifications
| Focuser type | 4.2-inch rack and pinion, 1:10 fine focus, M90x1 rotator |
|---|---|
| Tube length | 493 mm |
| Dovetail | Losmandy |
About
108mm f/5.6 quintuplet Petzval astrograph built on a front-triplet + rear-doublet layout with two ED elements. 600mm focal length over a 66mm image circle (beyond full frame); large 4.2" rack-and-pinion focuser, retractable dew shield (493mm retracted length).