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Related Manuals for ORION TELESCOPES & BINOCULARS ShortTube 4.5 EQ 9849
Summary of Contents for ORION TELESCOPES & BINOCULARS ShortTube 4.5 EQ 9849
- Page 1 INSTRUCTION MANUAL Orion ® ShortTube 4.5" EQ ™ #9849 Equatorial Reflecting Telescope 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 187 Rev. A 05/02...
- Page 2 EZ Finder II bracket EZ Finder II Bracket securing thumbnuts Focuser Eyepiece Tube rings Declination slow-motion control cable Declination lock knob Declination setting circle Right ascension setting circle Counterweight shaft Counterweight Right ascension Counterweight lock knob slow motion control cable Latitude adjustment T-bolt Latitude lock T-bolt (not shown)
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Page 3: Table Of Contents
ongratulations on your purchase of a quality Orion telescope. Your new ShortTube 4.5 is a terrific starter instrument for exploring the exotic wonders of the night sky. Designed to be compact and easy to use, this telescope will provide many hours of enjoyment for the whole family. If you have never owned a telescope before, we would like to welcome you to amateur astronomy. - Page 4 Declination lock knob Declination setting circle Right ascension lock knob Right ascension setting circle Latitude scale Latitude lock T-bolt Latitude adjustment Azimuth lock knob T-bolt Figure 2. The ShortTube 4.5’s equatorial mount. 1. Lay the equatorial mount on its side. Attach the tripod 6.
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Page 5: Getting Started
Figure 3a. Figure 3b. Proper orientation of the equatorial mount requires When you let go with both hands, the tube should not that the telescope tube be balanced on both the R.A. and Dec. drift up or down. axes. With the R.A. lock knob released, slide the counterweight along the counterweight shaft until it just counterbalances the tube. - Page 6 Power knob Naked-eye view Azimuth adjustment knob Mounting Altitude bracket adjustment knob View through telescope Figure 4. The EZ Finder II reflex sight. Figure 5. The view through a reflector telescope is upside down. scope, you can adjust the eyepiece position by loosening Operating the EZ Finder II Reflex Sight the tube rings and rotating the optical tube.
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Page 7: Setting Up And Using The Equatorial Mount
Little Dipper (in Ursa Minor) Big Dipper (in Ursa Major) Polaris Cassiopeia N.C.P. Figure 6. To find Polaris in the night sky, look north and find the Big Dipper. Extend an imaginary line from the two “Pointer Stars” in the bowl of the Big Dipper. - Page 8 Figure 1. The pointer on the Dec. setting circle should Optional Electronic Drives for Automatic read 90°. Retighten the Dec. lock lever. Tracking An optional DC electronic drive can be mounted on the R.A. 4. Loosen the azimuth lock knob at the base of the equatori- axis of the equatorial mount to provide hands-free tracking.
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Page 9: Collimating The Optics (Aligning The Mirrors)
Figure 7. This illustration show the telescope pointed in the four cardinal directions (a) north (b) south (c) east (d) west. Note that the tripod and mount have not been moved; only the telescope tube has been moved in the R.A. and Dec. axes. and rotate the telescope on the R.A. - Page 10 mary mirror centered in the sec- the telescope tube opposite the ondary mirror, and the reflection focuser (i.e., on the other side of of the secondary mirror (and your the secondary mirror) will also be eye) centered in the reflection of helpful in collimating the second- the primary mirror, as in Figure ary mirror.
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Page 11: Astronomical Observing
Knurled thumbscrew Phillips-head screw Figure 9. Figure 10. Figure 11. To center the Adjust the tilt of The tilt of the primary mirror is adjusted by turning secondary mirror under the the secondary mirror by one or more of the knurled collimation thumbscrews. focuser, hold the secondary in loosening or tightening the place with your fingers while... - Page 12 ture change, the more time is needed. Allow at least 30 min- utes for your telescope to cool to the temperature outdoors. Let Your Eyes Dark-Adapt Don’t expect to go from a lighted house into the darkness of the outdoors at night and immediately see faint nebulas, galaxies, and star clusters—or even very many stars, for that matter.
- Page 13 view), it’s like trying to find a needle in a haystack! Once B. The Sun you’ve centered the object in the eyepiece, you can switch to You can change your nighttime telescope into a daytime Sun higher magnification (shorter focal length eyepiece), if you viewer by installing an optional full-aperture solar filter over wish.
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Page 14: Care And Maintenance
E. Deep-Sky Objects oxidizing. These coatings normally last through many years of use before requiring re-coating (which is easily done). Under dark skies, you can observe a wealth of fascinating deep-sky objects, including gaseous nebulas, open and To clean the secondary mirror, first remove it from the tele- globular star clusters, and a variety of different types of scope. - Page 16 One-Year Limited Warranty This Orion ShortTube 4.5 EQ is warranted against defects in materials or workmanship for a period 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 defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076.
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