ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024 Instruction Manual

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[Page 1] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

IN 112 Rev. C 05/02 Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800) 676-1343 E-mail: [email protected] Corporate Offices (831) 763-7000 P.O. Box 1815, Santa Cruz, CA 95061 Orion ® AstroView ™ 90mm EQ #90...

[Page 2] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

2 Figure 1. AstroView 90 EQ Parts Diagram Tube ring mounting plate Dec. lock knob Dec. setting circle R.A. lock knob R.A. slow-motion control Counterweight lock knob Counterweight shaft Counterweight Latitude locking T-bolt Azimuth lock knob Accessor...

[Page 3] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

3 Table of Contents 1. Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Balancing the Telescope. . . . . . . . . . . . . . . 5 4. Aligning the Finder S...

[Page 4] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

4 apart enough to connect each end of the accessory tray bracket to the attachment point on each leg. Use the screw that comes installed in each attachment point to do this. First remove the screw, then line up one of the ends of the bracket with...

[Page 5] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

5 tighten the two black nylon screws a couple of turns each to secure the finder scope in place. 13. Insert the base of the finder scope bracket into the dovetail slot on the top of the focuser housing. Lock the bracket in position by tightening t...

[Page 6] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

6 3. Retighten the counterweight lock knob. The telescope is now balanced on the R.A. axis. 4. To balance the telescope on the Dec. axis, first tighten the R.A. lock knob, with the counterweight shaft still in the horizontal position. 5. With ...

[Page 7] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

7 1. Level the equatorial mount by adjusting the length of the three tripod legs. 2. Loosen the latitude locking T-bolt. Turn the latitude adjust- ing T-bolt and tilt the mount until the pointer on the lati- tude scale is set at the latitude of yo...

[Page 8] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

8 aligned, the object should be visible somewhere in the field of view. Once the object is visible in the telescope’s eyepiece, use the slow-motion controls to center it in the field of view. You can now switch to a higher magnification eyepiec...

[Page 9] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

9 The R.A. setting circle must be re-calibrated every time you wish to locate a new object. Do so by calibrating the setting circle for the centered object before moving on to the next one. Confused About Pointing the Telescope? Beginners occasion...

[Page 10] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

10 Depending on the altitude of the object you want to observe, the counterweight shaft will be oriented somewhere between vertical and horizontal. Figure 6 illustrates how the telescope will look pointed at the four cardinal directions—north, ...

[Page 11] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

11 manufacturers are a misleading advertising gimmick and should be dismissed. Keep in mind that at higher powers, an image will always be dimmer and less sharp (this is a funda- mental law of optics). The steadiness of the air (the “seeing”) ...

[Page 12] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

12 are good, you may be able to resolve thin cloud bands on the planet’s disk. SATURN The ringed planet is a breathtaking sight when it is well positioned. The tilt angle of the rings varies over a period of many years; sometimes they are seen e...

[Page 13] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

13 Using the finder scope, point the telescope at this star and center it on the crosshairs. Next, look again at the star chart and find another suitably bright star near the bright star cur- rently centered in the finder. Keep in mind that the fie...

[Page 14] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

14 ter another guide star on the eyepiece’s crosshairs. Once the object is centered in the camera, and a guide star is centered in the eyepiece, you’re ready to shoot. Deep-sky objects are quite faint, and typically require expo- sures on the o...

[Page 15] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

15 ...

[Page 16] ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024

Orion Telescopes & Binoculars Post Office Box 1815, Santa Cruz, CA 95061 Customer Support Help Line (800) 676-1343 • Day or Evening One-Year Limited Warranty This Orion AstroView 90 EQ is warranted against defects in materials or workmanship f...