Table of Contents
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Table of Contents
Related Manuals for Orion AstroView 120ST EQ
Summary of Contents for Orion AstroView 120ST EQ
- Page 1 MAnuAl Orion ® AstroView 120St EQ ™ #9005 Equatorial Refracting Telescope Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 89 Hangar Way, Watsonville, CA 95076 Providing Exceptional Consumer Optical Products Since 1975 IN 155 Rev. B 02/09...
- Page 2 Right Ascension slow-motion control Declination slow-motion control “Toe saver” Right Ascension lock lever Polar axis finder scope Latitude adjustment T-bolts Tripod leg Accessory tray attachment point Accessory tray bracket Accessory tray Leg lock knob Figure 1. The AstroView 120ST EQ Refractor...
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Page 3: Table Of Contents
Orion telescope! Your new AstroView 120ST 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
6. Orient the equatorial mount as it appears in Figure 1, at a latitude of about 40°, i.e., so the pointer next to the latitude scale (located directly above the Orion logo on one side of the mount) is pointing to the line at “40.” To do this, loosen one of the latitude adjusting T-bolts and then tighten the other latitude adjusting T-bolt until the pointer and the “40”... - Page 5 on the worm gear shaft. Then tighten the screw. 12. To place the finder scope in the finder scope bracket (Figure 3), first unthread the two black nylon thumbscrews until the screw ends are flush with the inside diameter of the bracket.
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Page 6: Balancing The Telescope
(c) With the Dec. lock knob released, loosen the tube ring lock clamps a few turns and slide the telescope forward or back in the tube rings. (d) When the tube is balanced about the Dec. axis, it will not move when you let. -
Page 7: Aligning The Finder Scope
Declination Setting Circle Front opening in R.A. axis Latitude scale Azimuth fine adjustment knobs Figure 6. The equatorial mount of the AstroView 120ST EQ. Declination lock lever Right Ascension lock lever Right Ascension Setting Circle Polar axis finder scope Latitude... - Page 8 3. Loosen the Dec. lock lever and rotate the telescope opti- cal tube until it is parallel with the R.A. axis. The pointer on the Dec. setting circle should read 90°. Retighten the Dec.
- Page 9 If you are on daylight savings time, subtract one hour from your current local time. For example, if it was November 1 at 9 PM, you would rotate the telescope in R.A. until the line above the “21” on the R.A. setting circle lines up with the long line between the “10”...
- Page 10 Earth, and Dec. is similar to latitude. The R.A. and Dec. values for celestial objects can be found in any star atlas or star catalog. So, the coordinates for the Orion Nebula listed in a star atlas will look like this: R.A. 5h 35.4m Dec. -5° 27’...
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Page 11: Using Your Telescope-Astronomical Observing
This illustration shows the telescope pointed in the four cardinal directions: tripod and mount have not been moved; only the telescope tube has been moved on the R.A. and Dec. axes. weight shaft is horizontal (parallel to the ground). Then loosen the Dec. -
Page 12: Cooling The Telescope
Red light does not spoil your eyes’ dark adaptation like white light does. A flashlight with a red LED light is ideal, such as the Orion RedBeam LED flashlight, or you can cover the front of a regular incandescent flashlight with red cellophane or paper. - Page 13 You can change your nighttime telescope into a daytime Sun viewer by installing an optional full-aperture solar filter over the front opening of the AstroView 120ST EQ. The primary attraction is sunspots, which change shape, appearance, and location daily. Sunspots are directly related to magnetic activ- ity in the Sun.
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Page 14: Astrophotography
Aim the telescope at the planet (or Moon) you wish to shoot. The image will be highly magnified, so you may need to use the finder scope to center it within the camera’s viewfinder. Turn the motor drive on. -
Page 15: Terrestrial Viewing
The AstroView 120ST Refractor may also be used for long-dis- tance viewing over land. For this application we recommend substitution of an Orion 45° Correct-Image Diagonal for the 90° star diagonal that comes standard with the telescope. The cor- rect-image diagonal will yield an upright, nonreversed image and also provides a more comfortable viewing angle, since the tele- scope will be aimed more horizontally for terrestrial subjects. -
Page 16: Specifications
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. If the product is not registered, proof of purchase (such as a copy of the original invoice) is required.