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INSTRUCTION MANUAL
Orion
6" f/4 Newtonian
®
Astrograph
#10269
®
Customer Support:
www.OrionTelescopes.com/contactus
Corporate Offices:
89 Hangar Way, Watsonville CA 95076 – USA
Providing Exceptional Consumer Optical Products Since 1975
Copyright © 2016 Orion Telescopes & Binoculars
All Rights Reserved. No part of this product instruction or any of its contents may be reproduced, copied,
modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.
IN 575 Rev. A 09/16
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Summary of Contents for ORION TELESCOPES & BINOCULARS 10269
- Page 1 INSTRUCTION MANUAL Orion 6" f/4 Newtonian ® Astrograph #10269 ® Customer Support: www.OrionTelescopes.com/contactus Corporate Offices: 89 Hangar Way, Watsonville CA 95076 – USA Providing Exceptional Consumer Optical Products Since 1975 Copyright © 2016 Orion Telescopes & Binoculars All Rights Reserved. No part of this product instruction or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes &...
- Page 2 Dovetail finder Optical tube scope base Tube rings 2" extension adapter Front 8X50 finder scope and bracket Screws (2) Dovetail bar Figure 1. Included components of the 6" f/4 Newtonian Astrograph. (Allen wrench not shown.) Table of Contents Introduction Introduction ......2 Congratulations on your purchase of the Orion 6"...
- Page 3 Parts List If the drawtube slips under the weight of your imaging system or heavy visual accessories, tighten the drawtube tensioning • Optical tube assembly thumbscrew on the underside of the focuser as needed. On the other hand if the focuser motion seems too stiff, loosen the •...
- Page 4 highly recommend use of a coma corrector (sold separately) designed for use with f/4 Newtonians, or for a range of focal ratios that includes f/4. Many common coma correctors have a 2" diameter housing and T-threads for attachment to a cam- Insert screw era.
- Page 5 Knurled ring Thumbscrews O-ring Dovetail finder scope base Spring pin Thumbscrew lock Figure 4. (a) Insert the finder scope into the bracket, then (b) install the bracket foot into the dovetail finder scope base and secure it with the thumbscrew lock. has male T-threads that couple to the female T-threads of your observing or imaging session, to make sure it is dead on.
- Page 6 from falling down onto the primary mirror and causing damage Telescope in the support materials for this telescope on our website. if something comes loose while you are making adjustments. Aligning the Secondary Mirror Star-Testing the Telescope To adjust the secondary mirror collimation, you will need a When it is dark, point the telescope at a bright star and accu- small Phillips screwdriver.
- Page 7 the telescope at Polaris (the North Star) if you do not have a mount that tracks. Care & Maintenance Give your telescope reasonable care and it will last a lifetime. When not in use, keep its dust cover on as well as the dust cap on the eyepiece opening.
- Page 8 Specifications Optical configuration: Newtonian reflector Aperture: 150mm Focal length: 610mm Focal ratio: Primary mirror: BK7 glass, parabolic figure Mirror coatings: Enhanced aluminum (94% reflectivity) with SiO2 overcoat Secondary mirror minor axis: 62.5mm Backfocus distance: 77.1mm Focuser: Dual-speed (10:1) 2" linear bearing Crayford, with 1.25" adapter Optical tube: Rolled steel, gloss black enamel finish Tube rings:...
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