Advertisement
Quick Links
INSTRUCTION MANUAL
Orion
6", 8", and 10" F/4
®
Newtonian Astrographs
#10269 - 6" f/4
#9505 - 8" f/4
#10271 - 10" f/4
#10269
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: (800) 447-1001
International: +1(831) 763-7000
Customer Support: support@telescope.com
A N E M P L O Y E E - O W N E D C O M P A N Y
Copyright © 2021 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 661 Rev. 06/21
Advertisement
Related Manuals for ORION TELESCOPES & BINOCULARS 10269
Summary of Contents for ORION TELESCOPES & BINOCULARS 10269
- Page 1 INSTRUCTION MANUAL Orion 6", 8", and 10" F/4 ® Newtonian Astrographs #10269 - 6" f/4 #9505 - 8" f/4 #10271 - 10" f/4 #10269 Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA Toll Free USA & Canada: (800) 447-1001 International: +1(831) 763-7000 Customer Support: support@telescope.com...
- Page 2 Table of Contents Congratulations on your purchase of the Orion® f/4 Newtonian Astrograph. These telescopes Parts List feature fast, high-quality parabolic optics; a machined, dual-speed Crayford focuser with Getting Started linear-track bearing; and excellent mechanical Operating the F/4 Newtonian Astrograph construction.
- Page 3 Parts List to purchase the appropriate length ¼"-20 bolts to attach an optional dovetail bar to the rings. • Optical tube assembly Balancing the Optical Tube on a Mount • Cooling fan (8" and 10" only, installed) The optical tube must be balanced on both the right ascension and declination axes of an equatorial mount for proper track- •...
- Page 4 Focus lock thumbscrew Accessory lock thumbscrew 1.25" Adapter Accessory lock 2" Collar thumbscrew Accessory Brass lock compression ring thumbscrew Coarse focus wheel 10:1 Fine focus wheel Drawtube tensioning thumbscrew Figure 2. The dual-speed 2" Crayford-type linear bearing focuser of 10:1, meaning ten turns of the fine focus wheel equals one chrome, spring-loaded tensioning pin on the bracket with your fingers (Figure 6A).
- Page 5 Focus lock knob 1.25" Compression Adapter ring 2" collar Drawtube tensioning thumbscrew Coarse focus Fine focus wheels wheel Figure 5. The aluminum 2" dual-speed linear bearing focuser. Figure 3. Attach the tube rings to the dovetail bar using the Lock ring Thumbscrews O-ring provided socket head cap screws and 5mm Allen wrench.
- Page 6 er’s 1.25" adapter, then insert that into the 35mm extension cold climates (below freezing), it is essential to store the tele- adapter.) You’ll need the 35mm extension adapter to reach scope as cold as possible. If it has to adjust to more than a focus with most eyepieces.
- Page 7 Figure 7. Rear of telescope showing the installed cooling fan and six collimation adjustment Black collimation knobs (three black collimation knob (x3) knobs and three white lock knobs). Back of primary mirror Cooling fan White lock knob (x3) Power jack file camera adapter onto the threads of the T-ring.
- Page 8 optical performance of the telescope or the image quality. That might seem counterintuitive, but it’s true! Preparing the Telescope for Collimating Once you get the hang of collimating, you will be able to do it quickly even in the dark. For now, it is best to collimate in day- light, preferably in a brightly lit room and aimed at a white wall.
- Page 9 for the time being. The secondary mirror itself should be cen- spider several turns. Now, grasp the mirror holder (the cylinder tered in the focuser drawtube. If it is off-center along the axis of that is attached to the back of the secondary mirror itself) with the telescope, i.e., positioned too far toward the front opening one hand while turning the center screw with a large Phillips or toward the rear of the telescope, as it is in Figure 11B, you...
- Page 10 that is fine for now. Then, tighten the three small alignment set light reflective surface and center black “dot” of the collimation screws equally to secure the secondary mirror in that position. cap) is off-center. The tilt of the primary mirror is adjusted with three spring-load- Adjusting the Secondary Mirror’s Radial Position ed collimation bolts on the rear end of the optical tube (bot- Like the axial position, the secondary mirror’s radial position...
- Page 11 Cleaning Mirrors In general, your telescope's mirrors will only need to be cleaned very infrequently, if ever. Covering the front opening of the tele- scope with the dust cover when it is not in use will prevent dust from accumulating on the mirrors. Keeping the dust cap on the focuser’s 1.25"...
- Page 12 Specifications 6" f/4 Newtonian Astrograph Optical configuration: Newtonian reflector Aperture: 150mm (5.9") Focal length: 610mm Focal ratio: F/4.1 Primary mirror: BK-7 optical glass, parabolic figure, center marked Mirror coatings: Enhanced aluminum (94% reflectivity) with SiO2 overcoat Secondary mirror minor axis: 62.5mm Backfocus distance: 77.1mm (from 2"...
- Page 13 10" f/4 Newtonian Astrograph Optical configuration: Newtonian reflector Aperture: 250mm (9.8") Focal length: 1000mm Focal ratio: F/4.0 Primary mirror: BK-7 optical glass, parabolic figure, center marked Mirror coatings: Enhanced aluminum (94% reflectivity) with SiO2 overcoat Secondary mirror minor axis: 88mm Back focus distance: 92.4mm (from 2"...
- Page 14 Page left blank intentionally...
- Page 15 Page left blank intentionally...
- Page 16 One-Year Limited Warranty This Orion product is warranted against defects in materials or workmanship for a peri- od of one year from the date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to be defec- tive, provided it is returned postage paid.
Need help?
Do you have a question about the 10269 and is the answer not in the manual?
Questions and answers