OTA · 2010–
Sky-Watcher Flextube 250P
Key specifications
| Aperture | 254 mm |
|---|---|
| Focal length | 1200 mm |
| Focal ratio | f/4.7 |
| Optical design | Newtonian |
| Weight | 14.97 kg |
All specifications
| Lens coating | Radiant Aluminum Quartz (RAQ), 94% reflectivity |
|---|---|
| Focuser type | 2" Crayford |
| Tube length | 800.1 mm |
| Dovetail | None |
About
10" (254mm) f/4.7 collapsible Flextube Dobsonian, 1200mm focal length — a portable large-aperture truss Newtonian that retains collimation when collapsed. Parabolic RAQ-coated optics (58mm secondary), 2" Crayford focuser.