Orion Ritchey-Chretien 8266 Instruction Manual Download

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i n s t r u c t i o n M a n u a l

IN 361 Rev. B 5/15

customer support (800) 676-1343 • E-mail: [email protected]

Corporate Offices (831) 763-7000 • 89 Hangar Way, Watsonville, CA 95076

Orion

Ritchey-Chrétien

Astrographs

#8268 6" f/9 RC
#8267 8" f/8 RC

#8266 10" f/8 RC

Providing Exceptional Consumer Optical Products Since 1975

OrionTelescopes.com

#8268

#8266

#8267

Summary of Contents for Ritchey-Chretien 8266

Page 1: ...76 1343 E mail support telescope com Corporate Offices 831 763 7000 89 Hangar Way Watsonville CA 95076 Orion Ritchey Chr tien Astrographs 8268 6 f 9 RC 8267 8 f 8 RC 8266 10 f 8 RC Providing Exception...

Page 2: ...x take a moment to confirm that all pieces are present and intact Refer to the Parts List to aid in identifying the included items The Focuser All Orion Ritchey Chretien telescopes come standard with...

Page 3: ...Coarse focus knob Millimeter and inch scales Fine focus knob Focuser attachment collar Dovetail finder scope bases Figure 1 A The 6 RC s Crayford focuser top view B Both the drawtube tensioning and l...

Page 4: ...lating infinity focus The goal is to reach focus with as little extension of the fo cuser drawtube as possible to avoid drawtube flexure Depending on what equipment you use to observe or image with yo...

Page 5: ...gonal Eyepiece 2 extension 1 extension 1 extension Optical tube Optical tube Optical tube DSLR camera body DSLR Camera Configuration Typical CCD Camera Configuration Standard Visual Configuration Off...

Page 6: ...ars on top of the tube Figure 7 custom designed by Orion to allow mounting of a guidescope or a DSLR camera for piggyback photography or even a second piggybacked telescope for visual use or imaging T...

Page 7: ...oriented horizontally and point it at a light colored wall 3 Insert the Cheshire eyepiece into the focuser via the included 1 25 adapter and tighten the thumbscrew on the adapter Make sure that a bri...

Page 8: ...ustment The optical axis is denoted by a thin outline of light white around the perimeter of the view through the collimating eye piece Figure 9A If this outline is not a perfect circle of uni form th...

Page 9: ...uld appear round and concentric with the dark disk exactly in the center Figure 12 If the dark central disk is off center the scope is out of collimation Adjust the collimation of the secondary mirror...

Page 10: ...ottom mounting bar V style narrow Top mounting bar None Cooling fans None Weight 12 1 lbs 8 Ritchey Chr tien Aperture 8 200mm Focal length 1600mm Focal ratio f 8 Mirror figure Hyperbolic Mirror materi...

Page 11: ...h SiO2 overcoat Optical Tube Steel Focuser 3 3 Linear bearing Crayford dual speed 10 1 Drawtube travel 50mm Backfocus distance 243 9mm from rear cell 139 6mm from 2 collar on drawtube Central obstruct...

Page 12: ...During this warranty period Orion Telescopes Binoculars will repair or replace at Orion s option any warranted instrument that proves to be defective provided it is returned postage paid Proof of pur...