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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
Primary mirror cell:
18-point flotation, 3 spring-
loaded collimation knobs
Secondary mirror:
80mm minor axis, low thermal
expansion optical glass
Secondary mirror holder:
4-vane spider assembly, 0.7mm
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:
69.25 lbs.
OTA weight, disassembled: Lower tube section, 52.9 lbs.
Upper tube section, 9.4 lbs.
Truss pole assemblies, 6.9 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:
Ultra-high molecular weight
(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",
multi-coated, threaded for Orion
filters
Eyepiece magnifications:
47.1x and 165x
Finder scope:
9x power, 50mm aperture,
achromatic, crosshairs, 5° field
of view
Finder scope bracket:
Spring-loaded X-Y adjustment,
dovetail base
Eyepiece rack:
Holds three 1.25" eyepieces
and one 2" eyepiece
Cooling accelerator fan:
Included, runs off of 12V DC
