7. Specifications
Optical Tube Assembly (OTA)
Primary mirror: | 356mm (14.0") diameter |
| reflective surface, low thermal |
| expansion optical glass, |
| parabolic, center marked |
Focal length: | 1650mm |
Focal ratio: | f/4.6 |
Secondary mirror: | 80mm minor axis, low thermal |
| expansion optical glass |
Secondary mirror holder: | |
| thick spider vanes, 3 SHCS for |
| tilt adjustment |
Mirror coatings: | Enhanced reflectivity (94%) |
| aluminum with SiO2 overcoat |
Focuser: | Dual speed Crayford, 11:1 |
| fine focus knob, accepts 2" |
| and 1.25" eyepieces, all metal |
| construction |
Optical tube design: | Truss tube |
Truss poles: | 8 total (4 truss pole assembles |
| with 2 poles each), 1.0" outer |
| diameter, aluminum black |
| anodized, captive assembly |
| hardware |
Navigation knob: | Included |
Optical tube material: | Rolled steel, 1.0mm thick |
Tube outer diameter: | 412mm (16.2") |
OTA weight, assembled: | 65.8 lbs. |
OTA weight, disassembled: Lower tube section, 36.3 lbs. Upper tube section, 9.4 lbs. Truss pole assemblies, 6.9 lbs. Counterweights (6), 13.2 lbs.
OTA length, assembled: | 61" |
OTA length, disassembled: Lower tube section, 21.75" long; Upper tube section, 8.1" long; Truss pole assemblies, 33.75" long
Mount |
|
Dobsonian base: | Collapsible design, |
| CorrecTension altitude |
| tensioning, side brace supports, |
| carry handle |
Azimuth bearing material: | Virgin Teflon on Ebony Star |
| laminate |
Altitude bearing material: | |
| (UHMW) polyethylene on ABS |
| plastic |
Altitude bearing diameter: | 8.0" |
IntelliScope functionality: | Computerized Object Locator |
| system included, 14,000+ |
| object database |
Base weight: | 45 lbs., assembled |
Approximate base |
|
dimensions: | 29" diameter x 27" tall |
Accessories |
|
2" Eyepiece: | 35mm Deep View, 2", multi- |
| coated, threaded for Orion filters |
1.25" Eyepiece: | 10mm Sirius Plössl, 1.25", |
| |
| filters |
Eyepiece magnifications: | 47.1x and 165x |
Finder scope: | 9x power, 50mm aperture, |
| achromatic, crosshairs, 5° field |
| of view |
Finder scope bracket: | |
| dovetail base |
Eyepiece rack: | Holds three 1.25" eyepieces |
| and one 2" eyepiece |
Cooling accelerator fan |
|
(set of three): | Optional (#7818) |
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