Instruction/ maintenance manual of the product 120ST EQ Orion
Go to page of 16
IN 155 Rev . B 02/09 Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800 ) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 89 Hangar Way , Watsonvi.
2 T ube rings Objectiv e lens cell Dew cap/lens shade Declination loc k le ver Large counterweight Small counterweight Counterweight lock knobs Counterweight shaft “T oe sa ver” T ripod leg Access.
3 1. Par ts List Qty . Description 1 Optical tube assembly 1 German-type equatorial mount 1 Large counterw eight 1 Small counterw eight 1 Counterweight shaft 3 T r ipod Legs with mounting hardware 1 A.
4 2. Assembly Car efully open all of the bo x es in th e shipp ing con taine r . Mak e sur e all the par ts listed in Secti on 1 are pr esent . Sa ve the bo x es and pack aging material . In th e unlik ely ev ent tha t you need to return the telescope , y ou m ust use the or iginal packag - ing.
on the worm gear shaft. Then tighten the scre w . 12. T o place the finder scope in the finder scope br acket (Figure 3), first unthread the two blac k nylon thumbscrews until the screw ends are flush with the inside diameter of the bracket.
6 3. Balancing the T elescope T o ensure smooth mov ement of the telescope on both axes of the equator ial mount, it is imperative that the optical tube is properly balanced. We will first balance the telescope with respect to the R.A. axis, then the Dec.
The telescope is now balanced on both axes . Now when you loosen the loc k lev er on one or both ax es and manually point the telescope, it should move without resistance and should not drift from where you point it.
T o find P olar is in the sky , look nor th and locate the pattern of the Big Dipper (Figure 7). The two stars at the end of the “bowl” of the Big Dipper point r ight to P olaris. Obser v ers in the Southern Hemisphere aren’t so f or tunate to hav e a bright star so near the south celestial pole (SCP).
9 that is cast into the mount (located directly below the large thumbscrew; see Figure 3). Retighten the thumbscrew . 2. Rotate the date circle until the “0” line on the meridian offset scale lines up with the time meridian indicator mark.
10 loosen the big tripod attachment knob directly under neath the base of the equatorial mount. The fine adjustment knobs work b y loosening one and then tightening the other . When done, retighten the tr ipod attachment knob to fir mly secure the mount and tripod.
11 c. d. Figure 9. This illustration shows the telescope pointed in the f our cardinal directions: (a) nor th, (b) south, (c) east, (d) west. Note that the tripod and mount ha ve not been moved; only the telescope tube has been moved on the R.A. and Dec.
Cooling the T elescope All optical instr uments need time to reach “ther mal equilibr i- um. ” The bigger the instr ument and the larger the temperature change, the more time is needed. Allo w at least a half-hour f or your telescope to cool to the temper ature outdoors.
13 lence causes objects viewed through the telescope to “boil. ” If the stars are twin kling noticeab ly when you look up at the sky with just y our e yes , the seeing is bad and y ou w ill be limited to vie wing with low powers (bad seei ng aff ects images at high pow ers more sev erely).
C. The Planets The planets don’t sta y put like the stars (the y don’t hav e fixed R.A. and Dec. coordinates), so you’ll hav e to ref er to char ts published monthly at our website, www .telescope.com, or in monthly magazines like Astronomy , Sky & T elescope , to locate them.
15 used or the image will be blurred beyond recognition. T r y expo - su re tim es bet w ee n 1 an d 10 sec on ds , d epe nd in g up on the brightness of the planet to be photographed and the ISO of the film being used.
Orion T elescopes & Binoculars 89 Hangar Way , Watsonville, CA 95076 Customer Support Help Line (800) 676-1343 • Day or Evening One-Y ear Limited W arranty This Orion AstroView 120ST Equatorial refractor is warr anted against def ects in materials or workman- ship for a period of one y ear from the date of purchase.
An important point after buying a device Orion 120ST EQ (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Orion 120ST EQ yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Orion 120ST EQ - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Orion 120ST EQ you will learn all the available features of the product, as well as information on its operation. The information that you get Orion 120ST EQ will certainly help you make a decision on the purchase.
If you already are a holder of Orion 120ST EQ, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Orion 120ST EQ.
However, one of the most important roles played by the user manual is to help in solving problems with Orion 120ST EQ. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Orion 120ST EQ along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
