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Orion 90 EQ - page 1
INSTRUCTION MANUAL IN 162 Rev . C 06/08 Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800)-676-1343 E-mail: support@telescope.com Corporate Offices (831)‑763‑7000 89 Hangar Wa y , W atsonville CA 95076 OrionT elescopes.com Orion ® StarMax ™ 90 EQ #9821 Equatorial Maksutov-Cassegrain T elescope ...
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Orion 90 EQ - page 2
2 Figure 1. Orion StarMax 90mm EQ Mounting bloc k Counterweight shaft Right Ascension slow‑motion control Counterweight Counterweight loc k knob T ripod leg Finder scope brac ket Finder scope Eyepiece Star diagonal Declination slow motion control Accessor y tra y Accessor y tra y brac ket Leg lock knob ...
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Orion 90 EQ - page 3
3 1. Unpacking The entire telescope system will arr ive in one box. Be careful unpacking the bo x. W e recommend keeping the or iginal ship‑ ping container . In the ev ent that the telescope needs to be shipped to another location, or retur ned to Orion for warranty repair , having the proper shipping container will help ensure that your telescop ...
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Orion 90 EQ - page 4
4 1 Soft carr y case 3 Assembly tools (small wrench, Phillips head screwdriver , tr iangular assembly tool) 3 Leg attachment screws 3 Leg lock knobs 3. Assembly 1. La y the equator ial 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 ...
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Orion 90 EQ - page 5
5 the latitude lock t‑bolt, and tur n the latitude adjustment t‑bolt until the pointer and the “40” line up . Then retighten the la titude lock t‑bolt. The declination (Dec.) and r ight ascension (R.A.) axes may need re‑positioning (rotation) as well. Be sure to loosen the R.A. and Dec. lock knobs bef ore doing this. Retighten the R.A. ...
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Orion 90 EQ - page 6
6 2. Now loosen the counterweight lock knob and slide the weight along the shaft until it e xactly counterbalances the tele‑ scope (Figure 3a). That’ s the point at which the shaft remains horizontal e ven when you let go of the telescope with both hands (Figure 3b). 3. Retighten the counterweight loc k knob. The telescope is now balanced on th ...
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Orion 90 EQ - page 7
7 to compensate f or that motion, allowing you to easily “track" the mov ement of astronomical objects, thereby keeping them from drifting out of the telescope’ s field of view while you’ re obser ving. This is accomplished by slowly rotating the telescope on its right ascension (R.A.) axis, using only the R.A. slow‑motion cable . But ...
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Orion 90 EQ - page 8
8 T racking Celestial Objects When you observe a celestial object through the telescope, you’ll see it drift slowly across the field of view . T o keep it in the field, if your equator ial mount is polar aligned, just tur n the R.A. slow‑motion control cable clockwise. The Dec. slow‑ motion control cable is not needed for trac king. Objects w ...
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Orion 90 EQ - page 9
9 Similarly , to point the telescope directly south, the counter ‑ weight shaft should again be hor izontal. Then you simply rotate the scope on the Dec. axis until it points in the south direction. What if you need to aim the telescope directly nor th, but at an object that is nearer to the horizon than P olar is? Y ou can’t do it with the cou ...
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Orion 90 EQ - page 10
10 adapte d, m ore stars will glimmer into vie w and you’l l be ab le to see f ainter details in objects you view in y our telescope. T o see what you’ re doing in the darkness, use a red ‑filtered flashlight rather than a whi te light. Red light does not spoil your ey es’ dark adaptation like white light does. A flashlight with a red LED l ...
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Orion 90 EQ - page 11
11 C. The Planets The planets don’t stay put like the stars, so to find them you should refer to Sky Calendar at our website (www .telescope. com), or to char ts published monthly in Astronomy , S ky & T eles cope , o r o t h er a s tr o n om y m a g az i n es . V en u s, M a r s, Jupiter , and Satur n are the brightest objects in the sky a f ...
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Orion 90 EQ - page 12
12 F rench astronomer Charles Messier , which represent some of the best and brightest deep‑sky objects. Determine in which constellation the object lies. Now , find the constellation in the sky . If you do not recognize the constella‑ tions on sight, consult a planisphere. The planisphere gives an all‑sky view and shows which constellations ...
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Orion 90 EQ - page 13
13 the finder scope caps on if you lea ve it attached to the optical tube. Cleaning the T ube Y our StarMax 90mm EQ telescope requires v er y 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 har m the tele ‑ scope. If y ...
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Orion 90 EQ - page 14
14 One-Y ear Limited W arranty This Orion StarMax 90mm EQ ™ is warranted against def ects in materials or workmanship for a period of one year from the date of purchase. This warranty is f or the benefit of the original retail purchaser only . Dur ing this warranty period Orion T elescopes & Binoculars will repair or replace, at Orion’ s op ...
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