Orion 8956 - Manual (Page 8)

8
Care and Cleaning of
the Optics
Do not disassemble the Ritchey-Chrétien for any reason,
including to clean the mirror. A small amount of dust and par-
ticulates on the mirror’s surface will not affect performance. In
the event internal cleaning is necessary the telescope should
be shipped to Orion Telescopes and Binoculars for service.
This telescope does not contain user-servicable parts and
disassembly of the components will void the warranty. When
not in use, please use the supplied dust cap(s) to keep dust
and particulates out of the tube and off the optics.
Specifications
6" f/9 Ritchey-Chrétien
Optical configuration
Ritchey-Chrétien
Figure Hyperbolic
Mirror material BK-7
Mirror Coating Enhanced, no less than
94% with SiO
2
Overcoat
Focuser Machined Aluminum
Dual-Speed (10:1) Linear
Bearing Crayford
Accessories Accepts 2" & 1.25"
Baffles 8 knife-edge baffles
Optical Tube Steel
Aperture 150mm (6”)
Focal Length 1370 mm
Focal Ratio f/9
Secondary Mirror Minor Axis 67mm
Length
406mm
Diameter 193mm
Weight 12.4 lbs.
Specifications:
8" f/8 Ritchey-Chrétien
Optical configuration
Ritchey-Chrétien
Figure Hyperbolic
Mirror material BK-7
Mirror Coating Enhanced, no less than
94% with SiO
2
Overcoat
Focuser Machined Aluminum
Dual-Speed (10:1) Linear
Bearing Crayford
Accessories Accepts 2" & 1.25"
Baffles 10 knife-edge baffles
Optical Tube Steel
Aperture 200mm (8")
Focal Length 1600mm
Focal Ratio f/8
Secondary Mirror Minor Axis 90mm
Length
476mm
Diameter 230mm
Weight 15.9 lbs