Orion SkyQuest XT12 IntelliScope Instruction Manual
Dobsonian telescope
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Summary of Contents for Orion SkyQuest XT12 IntelliScope
- Page 1 INSTRUCTION MANUAL Orion ® SkyQuest XT12 IntelliScope ™ ® #9988 Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 P.O. Box 1815, Santa Cruz, CA 95061 Providing Exceptional Consumer Optical Products Since 1975 IN 227 Rev. B 03/05...
- Page 2 4-vane spider (not visible) Navigation knob Right side panel Front brace Eyepiece rack Handle Top baseplate Computerized Object Locator (optional) Figure 1. The SkyQuest XT12 IntelliScope Finder scope Finder scope bracket Eyepiece Focuser Optical tube Tensioning knob Primary mirror cell IntelliScope...
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Page 3: Table Of Contents
Congratulations on your purchase of an Orion SkyQuest XT12 IntelliScope Dobsonian. It is a high- performance astronomical instrument designed to provide dazzling views of celestial objects and unprecedented ease of use. With the addition of the optional IntelliScope Computerized Object Locator (controller), you gain the ability to locate and view thousands of celestial objects with the push of a but- ton. -
Page 4: Assembly
Hex key (size 4mm) Plastic feet Feet attachment wood screws (length 1") Encoder board mounting wood screws Brass bushing Azimuth axis hex-head screw (length 2.25") Fender washers (diameter 1") Hex lock nut Altitude bearing cylinders Altitude bearing cylinder screws (length 1.5", black) Vertical stop knob Flat washers (2x1/16"... - Page 5 Make sure the thumbnuts have at least three full turns of engagement on the shafts. Assembling the SkyQuest XT12 IntelliScope mirror cell to the tube can be a bit tricky. This is because the large diameter and thin aluminum of the tube will cause the tube to become somewhat out of round once the rear end ring is removed.
- Page 6 Figure 9. Exploded view of the Dobsonian base. 1. With a Phillips screwdriver, screw the plastic feet into the underside of the ground baseplate (A) using the self-tap- ping wood screws provided. Insert the screws through the feet and thread them into the predrilled starter holes. 2.
- Page 7 Figure 11. To connect the baseplates, tilt them only slightly, as shown. Do not place them on their side. (a) Use one wrench (or pliers) to hold the hex nut steady (b) while turning the hex head of the azimuth axis screw with another wrench. Correct Tension pads Bearing cylinders...
- Page 8 With the XT system, you can change eyepieces or add a barlow lens without hav- ing to tediously adjust the telescope’s balance as you would with other Dobsonians. The altitude friction can be made equal to the azimuth friction, ensuring optimal performance.
- Page 9 (2) Inserting an Eyepiece The final step in the assembly process is to insert an eye- piece into the telescope’s focuser. First, take the cover cap off the focuser drawtube. Eyepiece Loosen the thumbscrew on the 1.25" eyepiece adapter Tensioner (Figure 20).
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Page 10: Aligning (Collimating) The Optical System
As an additional aid in collimating, the primary mirror of the SkyQuest XT12 IntelliScope has a tiny adhesive ring marking its exact center. This center ring will not affect the images you see when observing with the telescope in any way (since it... -
Page 11: Aligning The Secondary Mirror
The secondary mirror itself should be cen- tered in the focuser drawtube, in the direction parallel to the length of the telescope. If it isn’t, as in Figure 21b, it must be adjusted. This adjustment will rarely, if ever need to be done. -
Page 12: Aligning The Primary Mirror
Note About the 2"s Focuser The 2" focuser of the SkyQuest XT12 IntelliScope can be col- limated using three pairs of push-pull screws located at the base of the focuser (Figure 20). The focuser was collimated at the factory, however, and should not need to be adjusted. -
Page 13: Using Your Telescope
A good way to set the altitude tension is to point the telescope at about a 45° angle. Loosen the altitude tension knob until the front of the optical tube starts to drift upward. As it does so, tighten the tension knob just enough to make the tube stop drifting (Figure 29). -
Page 14: Aligning The Finder Scope
Figure 30. The view through a standard finder scope and reflec- tor telescope is upside down. This is true for the SkyQuest XT12 Intelliscope and its finder scope as well. is in the finder scope’s field of view, you will now use the align- ment thumbscrews to center the object on the intersection of the crosshairs. - Page 15 Magnification is calculated as follows: Telescope Focal Length (mm) Eyepiece Focal Length (mm) The SkyQuest XT12 IntelliScope has a focal length of 1500mm. So, the magnification with the supplied 25mm eye- piece is: 1500 mm = 60x...
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Page 16: Astronomical Observing
When putting the SkyQuest XT12 IntelliScope into a vehicle, common sense prevails. It is especially important that the optical tube does not get knocked around; this can cause the optics to become misaligned, and could dent the tube. - Page 17 Exposing your eyes to very bright day- light for extended periods of time can adversely affect your night vision for days.
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Page 18: Optional Intelliscope Computerized
These include gaseous nebulas, open and globular star clusters, and a variety of different types of galax- ies. The large aperture of the SkyQuest XT12 IntelliScope is particularly well suited to gathering light, which is critical for observing these usually faint celestial entities. For deep-sky observing it is important that you find an observing site well away from light pollution. -
Page 19: Care And Maintenance
Keep the dust cover on the front of the telescope when not in use. Your SkyQuest XT12 IntelliScope requires very little mechani- cal maintenance. The optical tube is steel and has a smooth painted finish that is fairly scratch-resistant. -
Page 20: Specifications
During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instru- ment that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076.