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Related Manuals for ORION TELESCOPES & BINOCULARS Skywatcher 120 EQ 9026
Summary of Contents for ORION TELESCOPES & BINOCULARS Skywatcher 120 EQ 9026
- Page 1 INSTRUCTION MANUAL Orion ® Skywatcher 120 EQ ™ #9026 Equatorial Refracting 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 124 Rev. B 1099...
- Page 2 Tube rings Objective lens cell Dew cap/ lens shade Declination lock lever Right Ascension slow-motion control Finder scope Latitude adjustment Finder bracket T-bolts Large counterweight Small counterweight Eyepiece Star diagonal Focus knob Right Ascension lock lever Counterweight shaft “Toe saver” retaining bolt Declination Counterweight lock slow-motion...
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Page 3: Table Of Contents
ongratulations on your purchase of a quality Orion telescope! Your new Skywatcher 120 EQ Refractor is designed for high-resolution viewing of astronomical objects. With its precision optics and equatorial mount, you’ll be able to locate and enjoy hundreds of fascinating celestial denizens, including the plan- ets, Moon, and a variety of deep-sky galaxies, nebulas, and star clusters. -
Page 4: Assembly
2. Assembly well. Be sure to loosen the RA and Dec. lock levers before doing this. Retighten them once the equatorial mount is properly oriented. Carefully open all of the boxes in the shipping container. Make sure all the parts listed in Section 1 are present. Save the boxes and packaging material. -
Page 5: Balancing The Telescope
12.To place the finder scope in the finder scope bracket, first unthread the two black nylon screws until the screw ends are flush with the inside diameter of the bracket. Place the O-ring that comes on the base of the bracket over the Setscrew body of the finder scope until it seats into the slot on the Pointer... -
Page 6: Aligning The Finder Scope
Figure 5. Proper operation of the equatorial mount requires that the telescope tube be balanced on both the R.A. and Dec. axes. (a) With the R.A. lock lever released, slide the counterweights along the counterweight shaft until they just counterbalance the tube. (b) When you let go with both hands, the tube should not drift up or down. (c) With the Dec. lock lever released, loosen the tube ring lock clamps a few turns and slide the telescope forward or back in the tube rings. -
Page 7: Setting Up And Using The Equatorial Mount
Alignment is easiest to do in daylight hours. First, insert the lowest- Objective Black nylon power (25mm) eyepiece into the star diagonal. Then loosen the lens cell alignment screws R.A. and Dec. lock levers so the telescope can be moved freely. Lock ring Point the main telescope at a discrete object such as the top of a telephone pole or a street sign that is at least a quarter-mile... - Page 8 pole (NCP), which is an extension of the Earth’s rotational axis out into space. Stars in the Northern Hemisphere appear to revolve around Polaris. To find Polaris in the sky, look north and locate the pattern of the Big Dipper (Figure 8). The two stars at the end of the “bowl”...
- Page 9 the setting circle lines up with the pointed indicator that is opening, or the light will be too bright, and you will also obstruct cast into the mount (located directly below the large the view of the polar finder. It may be helpful to have a friend setscrew;...
- Page 10 and Dec. axes; if you move the tripod, or change the tilt of the 3 Point the telescope at the bright star whose coordinates equatorial mount, you will need to polar align again. you know. Center the star in the telescope’s eyepiece. Lock the R.A.
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Page 11: Using Your Telescope-Astronomical Observing
Figure 10. This illustration shows 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 on the R.A. and Dec. axes. To point the telescope to the east or west, or in other directions, rooftops and chimneys, as they often have warm air currents you rotate the telescope on its R.A. - Page 12 Retighten the R.A. and Dec. lock levers.Then accurately center the Use of 2" Eyepieces object on the finder’s crosshairs using the R.A. and Dec. slow- Another nice feature of the Skywatcher 120 is its ability to use motion controls. The object should now be visible in the main either 1.25"...
- Page 13 is judged by the magnitude of the faintest stars you can see with of objects, such as galaxies, open star clusters, globular clus- the unaided eye (6th magnitude or fainter is desirable). ters, diffuse nebulas, and planetary nebulas. So, for example, your atlas might show a globular cluster sitting just above the Note About Chromatic Abberation lid of the “Teapot’...
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Page 14: Astrophotography
C. Stars cause the image to blur if no motor drive was used for tracking. The equatorial mount must be accurately polar-aligned, too. Stars will appear like twinkling points of light in the telescope. Even powerful telescopes cannot magnify stars to appear as As before, connect the T-ring to your camera. -
Page 15: Terrestrial Viewing
repositioning the camera on the piggyback adapter, or by moving painted finish that is fairly scratch-resistant. If a scratch does the main telescope. If you move the main telescope, then you will appear on the tube, it will not harm the telescope. If you wish, need to recenter another guide star on the illuminated eyepiece’s you may apply some auto touch-up paint to the scratch. - Page 16 One-Year Limited Warranty This Orion Skywatcher 120 Equatorial refractor is warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty is for the ben- efit 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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