Orion 8956, 8958 instruction manual i n s t r u c t i o n M a n u a l, OrionTelescopes.com

Models: 8956 8958

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Astrographs

#8956

#8958

Providing Exceptional Consumer Optical Products Since 1975

IN 361 Rev. A 9/09

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Contents

#8958 8 f/8 Ritchey-Chrétien Optical Tube Assembly #8956 6 f/9 Ritchey-Chrétien Optical Tube Assemblyi n s t r u c t i o n M a n u a l Orion Ritchey-Chrétien AstrographsSetting Up Your Telescope Parts ListUnpacking Your Telescope Figures 2a-d Unpacking the Optical Tube 2a 2b 2c 2dGrip-ring Focuser body Figure 3 Removing the focuser Page Attaching a Finder Scope Focusing the TelescopeInserting a Star Diagonal Inserting an EyepieceUsing the Collimating Eyepiece Collimating the Ritchey‑ChrétienSecondary Adjustment Image OrientationStar Testing Optical Axis Adjustment9b 9c SpecificationsSpecifications Care and Cleaning of the Optics6 f/9 Ritchey-Chrétien 8 f/8 Ritchey-ChrétienOne-Year Limited Warranty Orion Telescopes & BinocularsOrionTelescopes.com Customer Support Help Line