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Orion
SkyScanner BL 102mm and 135mm
®
Dobsonian Reflector Telescopes
Congratulations on your purchase of the Orion SkyScanner BL Dobsonian Reflector telescope.
Your new SkyScanner BL Dobsonian Reflector Telescope is designed for easy yet eye-opening explora-
tion of the heavens. If you have never owned a telescope before, we would like to welcome you to amateur
astronomy. Take some time to familiarize yourself with the night sky. Learn to recognize the patterns of
stars in the major constellations. With a little practice, a little patience, and a reasonably dark sky away from
city lights, you'll find your telescope to be a never-ending source of wonder, exploration, and relaxation.
These instructions will help you set up and use your SkyScanner BL telescope. Please read them thor-
oughly before getting started. Please save all original packaging. This will help protect your SkyScanner BL
in the unlikely event to need to return it.
The list of Included Items and the Assembly instructions are provided separately for the SkyScanner BL
102 and the SkyScanner BL 135. Please refer to the relevant sections for your particular telescope.
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.
INSTRUCTION MANUAL
#52598 SkyScanner BL 102mm
#52599 SkyScanner BL 135mm
#52598
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
#52599
IN 667 11/21
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Table of Contents
Related Manuals for Orion SkyScanner BL 102mm
Summary of Contents for Orion SkyScanner BL 102mm
- Page 1 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 &...
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Page 2: Included Items
Side brace/ 10mm Plossl 3x Barlow lens eyepiece handle eyepiece Figure 1. Parts of the SkyScanner BL 102mm Dobsonian. • MoonMap 260 • Bottom ground plate (with feet and azimuth axis bolt SkyScanner BL 102 pre-installed) • Top ground plate... - Page 3 Tension knob Assembly of the SkyScanner BL 102mm Attach side brace to side panel with two assembly screws (Figure 2). Attach eyepiece rack to side panel with two assembly screws (Figure 3).
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Page 4: Getting Started
Flat washer Plastic disc Tension knob Altitude Spring washer Tension knob Remove plastic sleeve! Figure 7. Remove and discard the plastic Figure 8. A) Insert the altitude axis bolt through the hole at the top of the side panel. B) Thread a flat washer, then a spring washer, then a tension knob onto the bolt. sleeve on altitude axis bolt. -
Page 5: Focusing The Telescope
Focusing the Telescope Both SkyScanner BL telescopes come equipped with a rack- First, remove the dust cover from the front of the tele- and-pinion focuser. The SkyScanner BL 102mm has a 1.25" scope. focuser, which accepts only eyepieces with 1.25"-diameter With the 25mm eyepiece installed in the focuser, point the barrels. - Page 6 Altitude tension Azimuth tension knob Optical tube knobs Bearing cylinders Dust cap Screwdriver Assembly 10mm 25mm screws eyepiece eyepiece Barlow Handle Red dot scope Flat washer Spring washer Side panels Top ground plate Bottom ground plate Eyepiece rack Front panel Side braces Figure 11.
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Page 7: Using Your Telescope
Front panel Figure 12. Attach a side brace to each side Figure 13. Attach the front panel to the Figure 14. Install the top ground plate to the panel with base assembly screws. two side panels. side panel assembly as shown. Remove the old battery from underneath the spring tab and replace it with a new one, with (+) side facing the spring tab as shown in Figure 25. - Page 8 Figure 19. Lift the optical tube Figure 20. Thread an altitude into the base, resting the altitude tension bolt through the hole in hubs on the bearing cylinders the side panel and into the altitude installed in the previous step. hub on each side.
- Page 9 Figure 26. Megrez connects the Big Dipper’s handle to it's “pan” . It is a good guide to how conditions are. If you can not see Megrez (a 3.4 mag star) then conditions are poor. Figure 23. The red dot scope superimposes a red LED dot onto the night sky, showing right where your telescope is pointed.
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Page 10: Magnification Limits
Using the MoonMap 260 re-center it. Objects appear to move across the field of view Orion’s MoonMap 260 is a great observing aid to use when view- faster at higher magnifications. This is because the field of view ing the Moon with your SkyScanner BL. With it you will be able becomes narrower. -
Page 11: Objects To Observe
surface meets the dark portion. Due to the low angle at which and Saturn are the brightest objects in the sky after the Sun sunlight strikes this part of the Moon, shadows cast by crater and the Moon. Your SkyScanner BL is capable of showing you walls and other high-elevation features are elongated, thereby these planets in some detail. -
Page 12: Aligning The Mirrors (Collimation)
Aligning the Mirrors NOTE: Precise collimation is best achieved by using an optional collimating tool, such as a quick-collimation cap, a Cheshire (Collimation) eyepiece, or a laser collimator. Check our website for available collimating tools. Figures 29B through 29D assume that you Collimation is the process of adjusting the optics of a telescope have an optional Cheshire eyepiece or collimation cap in the so they are precisely aligned with one another and with the tele-... -
Page 13: Aligning The Primary Mirror
Collimation knob Lock screw Out of collimation Collimated Figure 31. A star test will determine if the telescope's optics are properly collimated necessary, adjusting them one way or the other and seeing if the secondary mirror reflection moves closer to the center of the primary mirror reflection. -
Page 14: Specifications
Specifications SkyScanner BL 102mm SkyScanner BL 135mm Primary mirror: 102mm diameter Primary mirror: 135mm diameter Secondary mirror: 35mm minor axis Secondary mirror: 25mm minor axis Mirror coatings: Aluminum with SiO2 overcoat Mirror coatings: Aluminum with SiO2 overcoat Central obstruction: 31.2mm (30.6%) Central obstruction: 38mm (28.1%) -
Page 16: One-Year Limited Warranty
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...