| Use |
Astronomy |
| User level |
Beginner |
| Optical design |
Reflector |
| Optical diameter |
150mm |
| Focal length |
750mm |
| Focal ratio |
f/5.0 |
| Optics type |
Parabolic |
| Glass material |
Soda-lime plate |
| Eyepieces included |
Sirius Plossl 25.0mm, 10.0mm |
| Magnification with included eyepieces |
30x, 75x |
| Resolving power |
0.77arc sec |
| Lowest useful magnification |
21x |
| Highest useful magnification |
300x |
| Limiting stellar magnitude |
13.6 |
| Optical quality |
Diffraction limited |
| Finder scope |
EZ Finder II |
| Focuser |
1.25" Rack-and-pinion |
| Secondary mirror obstruction |
47mm |
| Secondary mirror obstruction |
31% by diameter |
| Secondary mirror obstruction by area |
9% |
| Mirror coatings/over-coatings |
Aluminum & Silicon Dioxide |
| Mount style |
Altazimuth |
| Bearing material |
Teflon bearings |
| Latitude range |
9-72 |
| Tube material |
Steel |
| Tripod material |
Wood |
| Other features |
Navigation knob, pre-assembled base |
| Length of optical tube |
28.0 in |
| Weight, optical tube |
12.0 lbs |
| Weight, mount/tripod |
11.5 lbs |
| Weight, fully assembled |
23.5 lbs |
| Additional included accessories |
3 eyepiece rack |
| Warranty |
Orion 1 year limited warranty |