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Orion 9025 - page 1
IN 112 Rev . A 0399 Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 P .O. Box 1815, Santa Cruz, CA 95061 INSTRUCTION MANUAL Orion ® Skywatcher ™ 90mm EQ #9024 Equatorial Refracting T elescope ...
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Orion 9025 - page 2
2 Figure 1. Skywatcher 90 EQ P ar ts Diagram T ube ring mounting plate Dec. lock knob Dec. setting circle R.A. lock knob R.A. slow-motion control Counterweight loc king thumbscrew Counterweight Counterweight shaft Latitude locking t-bolt Azimuth adjustment knob Accessor y tra y brack et attachment point T ripod leg lock knob Piggy back camer a adap ...
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Orion 9025 - page 3
3 1. Par ts List Qty . Description 1 Optical tube assembly 1 German-type equator ial mount 2 Slow-motion control cab les 1 Counterweight 1 Counterweight shaft 3 T r ipod legs 1 Accessor y tra y with mounting hardware 1 Accessor y tra y brac ket 2 Optical tube mounting rings (located on optical tube) 1 6x30 achromatic crosshair finder scope 1 Finder ...
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Orion 9025 - page 4
4 finder scope or ey epieces with your fingers. The optical sur- f aces hav e delicate coatings on them that can easily be damaged if touched inappropriately . NEVER remov e any lens assembly from its housing f or any reason, or the product war- ranty and return policy will be void. 1. La y the equatorial mount on its side. Attach the tripod legs, ...
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Orion 9025 - page 5
5 rotate freely about the R.A. axis. Rotate it until the coun- terweight shaft is parallel to the g round (i.e., horizontal). 2. Now loosen the counterweight loc king thumbscrew and slide the weight along the shaft until it e xactly counterbal- ances the telescope. (Figure 2a) That’s the point at which the shaft remains horizontal e ven when y ou ...
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Orion 9025 - page 6
6 scale is set at the latitude of your observing site. If you don’t know y our latitude, consult a geogr aphical atlas to find it. F or example , if your latitude is 35° Nor th, set the pointer to +35. Then retighten the latitude locking t-bolt. The latitude setting should not hav e to be adjusted again unless you mo ve to a diff erent viewing l ...
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Orion 9025 - page 7
7 Figure 1 the telescope is pointed nor th as it w ould be during polar alignment. The counterweight shaft is oriented down- ward. But it will not look like that when the telescope is pointed in other directions. Let’ s say y ou want to vie w an object that is directly ov erhead, at the zenith. How do you do it? One thing you DO NO T do is make a ...
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Orion 9025 - page 8
8 F or e xample , the Skywatcher 90 EQ, which has a f ocal length of 910mm, used in combination with a 25mm ey epiece , yields a power of 910 ÷ 25 = 36x. Every telescope has a useful limit of power of about 45x-60x per inch of aper ture. Claims of higher power b y some tele- scope manuf acturers are a misleading adver tising gimmick and should be ...
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Orion 9025 - page 9
9 published monthly in Astronomy , Sky & T elescope , or other astronomy magazines to locate them. V enus, Mars, J upiter , and Saturn are the br ightest objects in the sky after the Sun and the Moon. Not all f our of these planets are normally visi- ble at an y one time. JUPITER The largest planet, Jupiter , is a great subject to obser v e. Y ...
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Orion 9025 - page 10
10 the planet to be photographed and the ISO of the film being used. “Piggybacking” Photography The Moon and planets are interesting targets f or the budding astrophotographer , but what’ s next? Literally thousands of deep-sky objects can be captured on film with a type of astrophotograph y called “piggybac king. ” The basic idea is that ...
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Orion 9025 - page 11
11 ing optical surf aces with your fingers , as skin oil may etch optical coatings. T o remove fingerpr ints or smudges from a lens, use photo- graphic-type lens cleaning fluid and lint-free optical lens cleaning tissue. Do not use household cleaners or e yeglass- type cleaning cloth or wipes, as the y often contain undesirab le additives lik e sil ...
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Orion 9025 - page 12
12 Figure 2c. Prepar ing the telescope to be balanced on the Dec. axis by first releasing the Dec. lock knob . Figure 2d. Balancing the telescope with respect to the Dec. axis. As shown here , the telescope is out of balance (tilting). Figure 2e. T elescope is no w balanced on the Dec. axis, i.e ., it remains horizontal when hands are released. Fig ...
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Orion 9025 - page 13
13 RIGHT ASCENSION AXIS Declination (Dec.) slow motion control Latitude adjustment t-bolt Azimuth adjustment knob R.A. lock knob Declination (Dec.) setting circle Right ascension (R.A.) setting circle Right ascension (R.A.) slow motion control Latitude locking t-bolt Latitude scale Figure 3. The equatorial mount. DECLINA TION AXIS Figure 4. T o fin ...
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Orion 9025 - page 14
14 Figure 5a. T elescope pointing south. Note that in all these illustrations, the mount and tripod remain stationary; only the R.A. and Dec. axes are mo ved. Figure 5b . T elescope pointing north. Figure 5c. T elescope pointing east. Figure 5d. T elescope pointing west. ...
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Orion 9025 - page 15
15 One-Y ear Limited W arranty This Orion Skywatcher 90 EQ is warr anted against defects in materials or workmanship f or a period of one year from the date of purchase. This warranty is f or the benefit of the original retail purchaser only . During this warranty period Orion T elescopes & Binoculars will repair or replace, at Orion’ s optio ...
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Orion 9025 - page 16
During recent production of our Skywatcher 90 EQ (#9024), Explorer 90 AZ (#9025), and Shor tT ube 80 (#9086) tele- scopes, we de veloped an improv ed design for the finder scope brac ket. The new design mak es aiming the finder scope much easier , since it requires adjustment to only two alignment screws instead of three . As a result of this impro ...
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