Table of Contents
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instruction Manual
orion
®
starMax
90 EQ
™
#9821 Equatorial Maksutov-Cassegrain Telescope
customer support (800)‑676‑1343
E‑mail: support@telescope.com
Corporate Offices (831)‑763‑7000
89 Hangar Way, Watsonville CA 95076
oriontelescopes.com
Providing Exceptional Consumer Optical Products Since 1975
IN 162 Rev. C 06/08
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Table of Contents
Related Manuals for Orion STARMAX 90 EQ
Summary of Contents for Orion STARMAX 90 EQ
- Page 1 Manual orion ® starMax 90 EQ ™ #9821 Equatorial Maksutov-Cassegrain Telescope customer support (800)‑676‑1343 E‑mail: support@telescope.com Corporate Offices (831)‑763‑7000 89 Hangar Way, Watsonville CA 95076 oriontelescopes.com Providing Exceptional Consumer Optical Products Since 1975 IN 162 Rev. C 06/08...
- Page 2 Finder scope bracket Finder scope Mounting block Eyepiece Counterweight shaft Star diagonal Right Ascension slow‑motion control Declination slow motion control Counterweight Counterweight lock knob Tripod leg Accessory tray Accessory tray bracket Leg lock knob Figure 1. Orion StarMax 90mm EQ...
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Page 3: Table Of Contents
Moon, and a variety of deep‑sky galaxies, nebulas, and star clusters. If you have never owned a telescope before, we would like to welcome you to amateur astronomy. Take some time to familiarize yourself with the night sky. Learn to recognize the patterns of stars in the major constellations. -
Page 4: Assembly
Soft carry case Assembly tools (small wrench, Phillips head screwdriver, triangular assembly tool) Leg attachment screws Leg lock knobs 3. assembly 1. Lay the equatorial mount on its side. Attach the tripod legs, one at a time, to the base of the mount by sliding a tripod leg attachment screw through the top of a leg and through the holes in the base of the mount. -
Page 5: Getting Started
The telescope system is now fully assembled. Keep the dust cover over the front end of the telescope when it is not in use. It is also a good idea to cover the eyepiece; use the cover cap that came with it. -
Page 6: Setting Up And Using The Equatorial Mount
(Figure 3b). 3. Retighten the counterweight lock knob. The telescope is now balanced on the R.A. axis. It is not nec‑ essary to balance the telescope on the Dec. axis, since the optical tube’s mounting block is positioned so that the tele‑... -
Page 7: Polar Alignment
“track" the movement of astronomical objects, thereby keeping them from drifting out of the telescope’s field of view while you’re observing. This is accomplished by slowly rotating the telescope on its right ascension (R.A.) axis, using only the R.A. - Page 8 Dec. setting circle are negative. So, the coordinates for the Orion Nebula listed in a star atlas will look like this: R.A. 5h 35.4m Dec. ‑5° 27' That’s 5 hours and 35.4 minutes in right ascension, and ‑5...
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Page 9: Using Your Telescope-Astronomical Observing
Dec. so it points to where you want it near the horizon. To point the telescope to the east or west, or in other directions, you rotate the telescope on its R.A. and Dec. axes. Depending on the altitude of the object you want to observe, the counterweight shaft will be oriented some‑... - Page 10 1250mm ÷ 25mm = 50x Every telescope has a useful limit of power of about 2x per mm of aperture (about 180x for the StarMax 90mm EQ). Claims of higher power by some telescope manufacturers are a misleading advertising gimmick and should be dismissed.
- Page 11 Star hopping, as it is called by astronomers, is perhaps the simplest way to hunt down deep‑sky objects to view in the night sky. It entails first pointing the telescope at a bright star close to the object you wish to observe, and then progressing to other stars closer and closer to the object until it is in the field of view of the eyepiece.
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Page 12: Terrestrial Viewing
(by unthreading the three wing screws) in order to fold the tripod legs together. It may also be convenient to remove the slow‑motion control cables and counterweight shaft. Orion offers an optional Padded Scope Case that will fit the entire EQ‑1 Mount. -
Page 13: Specifications
Your StarMax 90mm EQ telescope requires very little mechanical maintenance. The optical tube is aluminum and has a smooth painted finish that is fairly scratch‑resistant. If a scratch does appear on the tube, it will not harm the tele‑... - Page 14 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 regis‑ tered, proof of purchase (such as a copy of the original invoice) is required.