Instruction/ maintenance manual of the product C80ED-R Celestron
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A A d d v v a a n n c c e e d d S S e e r r i i e e s s A A d d v v a a n n c c e e d d S S e e r r i i e e s s G G G T T T I I N N S S T T R R U U C C T T I I O O N N M M A A N N U U A A L L C C 8 8 .
2 INTRODUCTI ON............ ............. ............... ............... ........... ................ ............ ............... ...... ......... .... ....... .....4 Warning ..........................................................................
3 Light Control .................................................................................................................. .................. 27 Factory Settin gs ................................................................................
4 Congratulations on your purchase of the Cele stron Advanced Series telescope (AST)! Th e Advanced Series of telescopes come in standard (non-computerized) and computer ized GT models. The Advanced Series is made of the hi ghest quality materials t o ensure stability and durability.
5 Fig 1-2 - The Advanced GT Series C80-GT Show n 1. Objective Lens 10. Focuser 2. Declination Motor Drive 11. Diagonal 3. RA /Dec locks 12. Eyepiece 4. Counterweight Bar 13. Finderscope 5. Counterweights CONTROL PANEL 6. Center Leg Brace / Accessory Tray A.
6 This section covers the assembly in structions for your Ce lestron Advanced Se ries Telescope ( AST). Y our AST telescope should be set up indoor the first time so that it is easy to identify th e various parts and fam iliarize yourself with the correct assembly procedure before attempting it ou tdo or.
7 attaches to the t ripod head. On one side of the tripod head there is a metal al ignment peg f or aligning the mount. This side of the tripod will face no rth when setting up for an astronom ical observing session. To attach the equatorial head: 1. Locate the azim uth adjustment scre ws on t he equatorial mount.
8 I I n n s s t t a a l l l l i i n n g g t t h h e e C C o o u u n n t t e e r r w w e e i i g g h h t t The Advance d Equatorial m ount come s with either o ne or two counte rweights (depe nding on the m odel). To install the counterweight(s): 1. Orient the mount so that the coun terweight bar points toward the ground .
9 4. Slide the R.A. slow motion knob onto the R.A. shaft. The knob is a tension fit, so sliding it on holds it in place . As m entioned above, there are two R.A. shafts, one on either side of t he mount. It makes no diffe rence which sh aft you use since b oth work the sam e.
10 T T h h e e O O p p t t i i c c a a l l T T u u b b e e Installing the Finderscope To install the fi nderscope onto the tel escope you m ust first m ount the find erscope throug h the finde r bracket an d then attach it to th e telescop e.
11 Installing the Eyepieces The eyepiece, or ocular as it is also ca lled, is an optical element that magnifi es the image focuse d by the telescope. Without the eyepiece it would be impossible to use the telescope visually. The eye piece fits di rectly into the focuser.
12 Balancing the Telescope in DEC The telescope should also be balanced on the declination axis to prevent any sudd en motions when the DEC clamp (Fig 2-5) is released. To balance the telescope in DEC: 1. Release the R. A. clamp and rotate the telesc ope so that i t is on one side of the m ount (i.
13 Adjusting the Mount in Altitude • To i ncrease the latitude of the po lar axis, tighten the rear latit ude adjustm ent screw and loosen t he front sc rew (if necessary). • To decrease the latitude of the polar axis, tigh ten the fr ont (under the counterweight bar) latitude ad justment screw and loosen the rear screw (if necessary).
14 Locate the Declination cable and plug one end of the cab le into the port on the electronics panel labe led DEC Port and plug the other end of the cable int o the port l o cated on the declination mo tor drive (see Fig 2-15) .
15 The Advance d Series GT, com puterized ver sion of each tel escope has a ha nd controller designed to gi ve you insta nt access to all the functions that your telescope has to offer.
16 4. Catalo g Keys: The Adva nced Series has keys on the hand contr ol to allow di rect access to each of the catalogs in its database. The ha nd control contains the following catalog s in its database: Messier – Complete list of all Messier objects.
17 A A l l i i g g n n m m e e n n t t P P r r o o c c e e d d u u r r e e s s In order for the telescope to accurately poi nt to objects in the sky, it must first be a ligned to three known positions (stars) in the sky. With th is information, the telescope can create a model of the sky, which it uses to locate any object with known coordinates.
18 4. Select one o f the four al ignment m ethods as desc ribed belo w. Note: If incorrect information is entered into the hand con trol, the UNDO button acts like a back space butto n allowing the user to re-enter t he correct data.
19 the eyepiece, pressing ENTER when complete. NOTE: Although the telescope allows the user to select the alig n ment stars, for best all-sky pointing accuracy it is still ne ce ssary to select two alignment stars on one side of the Meridian and the third star on th e opposite side of the Meridian.
20 O O b b j j e e c c t t C C a a t t a a l l o o g g Selecting an Object Now that the telescope is properly aligned, you can choose an object from any of the catalogs in the telescope' s extensive database. The hand co ntrol has a k ey (4) designat ed for each of the catalogs i n its database.
21 Tour Mode The Advanced Series telescopes incl ude a tour feature which aut omatically allo ws the user to choose from a list of interesting objects based on the date and time in which you are observing.
22 1 = .5x 6 = 64x 2 = 1x (si dereal) 7 = .5º / sec 3 = 4x 8 = 2º / sec 4 = 8x 9 = 3º / sec 5 = 16x S S e e t t u u p p P P r r o o c c e e d d u u r r e e s s The Advance d GT contai ns many user defined setup func tions designe d to give t he user cont rol over t he telescope's many advanced features.
23 that is not includ ed in the regular database. There are several ways to save an object to memory depe nding on w hat type of object it is: GoTo Object: To go to any of the user defined o bjects stored in t he database, scrol l down to either GoTo Sky Obj or Goto Land Obj and enter the number of the object you wish to select and press ENTER.
24 Note: Some of the databases contain thousa nds of objects , and can the refore take seve ral mi nutes to return t he closest objects. Precise GoTo The Advance d Series telescope s have a preci se g.
25 example, if yo u are observing fr om a mountainous locati on where the horiz on is parti ally obscured, you can set your minimum altitud e limit to read +20º. Th is will make sure that the hand control only displays objects th at are higher in altitude than 20º.
26 in R.A. (azimuth) until it reach es the point that the cables are extended to their maximum. Then by displaying the telescopes azimuth in this p osition (by looking at Get Alt-Az under the Utilities menu) you can determ ine the telescopes azimuth at its most exten ded position.
27 should be. Use the e quatorial head latitude and azimuth ad justments to pl ace Polaris in th e center of the eyepiece. Do not use the direction buttons to pos ition Polaris. Once Polaris is cente red in the eyepiece press ENTER; the polar axis should th en be pointed towards the North Celestial Pole.
28 EQ NOR TH EQ SOUT H OFF MOD E SIDE REAL SOLA R LUN AR RA T E TRA CKIN G VIEW T I ME-S IT E SETU P T IM E- SIT E ANT I- BACKLAS H FILTER LIMIT S DIRECTIO N B UTTO NS GOTO APPR OAC H AUT OGUID E RAT .
29 Actual image orientation as seen with the unaided eye Inverted image, as viewed with the eyepiece dir ectly in telescope Reversed from left to right, as viewed with a Star Diagonal A telescope is an instrum ent that collects and fo cuses light. Th e nature of the optical design determines how the light is fo c used.
30 F F o o c c u u s s i i n n g g To focus your telescope, simply turn the focus knob located directly below the focu ser. Turning the knob clockwise allows you to focus on a n object that is fart he r than the one you are curren tly observing.
31 magnifica tion, most observing is done in the range of 20 to 35 power for every inch of aperture which for the 80ED is 64 to 112. Determining Field of View Determining the field of view is important if you want to get an idea of the angular size of the object you are obs erving.
32 Up to this point, this manual covered the assembly and ba sic operation of your telescope . However, to understand your telescope more thoroughly, you need to know a little abou t the night sky. This section deals with observational astronomy in general and includ es informa tion on the night sky and polar alignment.
33 Motion of the Stars The daily motio n of the Sun across the sky is familiar to even the most casual observer. This daily trek is not the Sun moving as early astronomers thought, but the result of the Earth ' s rotation.
34 Latitude Scales The easiest way to polar align a telescop e is with a latitude scale. Unlike other methods th at require you to find the celestial pole by iden tif ying certain stars near it, this method works off of a known constant to determine how high the polar axis should be pointed.
35 Remember, while Polar aligning, do NOT move the telescop e in R.A. or DEC. You do not want to move the telescope itself, but the polar axis. The telescope is used simpl y to see where the polar axis is pointing. Like the previous method, this gets yo u close to the pole but not directly on it.
36 D D e e c c l l i i n n a a t t i i o o n n D D r r i i f f t t M M e e t t h h o o d d o o f f P P o o l l a a r r A A l l i i g g n n m m e e n n t t This method of polar alignment allows you to .
37 With your telescope set up, you are r eady to use it for obser ving. This section covers visual obs erving hints for both solar system and deep sky objects as well as general obser ving conditions which will affect your ability to observe. Observing the Moon Often, it is tempting to look at the Moon when it is full.
38 For safe solar viewing, use a sol ar filter that reduces the int e nsity of the Sun ' s light, m aking it safe to view. With a filter you can see sunspots as they move across the solar disk and faculae, which are bright patches seen near the Sun's edge.
39 disturbances vary from time-to-time and place-to-place. The size of the air parcels compared to your apert ure determines the "seeing" qualit y. Under good seeing conditions, fi ne detail is visible on the brighter planets like Jupiter and Mars, and stars are pinpoint images.
40 After looking at the night sky for a while you may want to try photographing it. Several forms of photography are possible with your telescope, including terr estrial and celestial ph otography. Both of these are discussed in moderate detail with enough information to get you started.
41 5. Locate the area of the sky that you want to photog raph and m ove the telescope so that it points in that direction. 6. Find a suitable guide star in t h e telescope eyepiece field of view. This is relatively easy since you ca n search a wide area without affecting the area cove red by your cam era lens.
42 6. Advance the film and repeat the process. Lunar Phase ISO 50 ISO 100 ISO 200 ISO 400 Crescent 1/2 1/4 1/8 1/15 Quarter 1/15 1/30 1/60 1/125 Full 1/30 1/60 1/125 1/250 The exposure times listed in table 7-1 should be used as a st arting point. Always make exposures that are longer and shorter than the recommended time.
43 Auto Guiding The Advanced GT telescope has a designated auto gu iding port for use with a CCD autoguider. The diagram below may be useful when connecting th e CCD camera cable to the telescope and calibrating the autoguider. No t e that the fo u r out put s are active-low, with internal pu ll-ups and are capable of sinking 25 mA DC.
44 While your teles cope requires little main tenance, there are a few things to remember that will e nsure your telescope performs at its best. C C a a r r e e a a n n d d C C l l e e a a n n i i n n g g o o f f t t h h e e O O p p t t i i c c s s Occasionally, dust and/or mo isture may build up on the obje c ti ve lens of y our telescope.
45 You will find that additional accessories enhance your viewi ng pleasure and exp and the usefulness of your telescope. For ease of referen ce, all the acc essories are listed in alphabe tical order.
46 Flashlight , Night Vision - (#93588) - Celestron’s premium model for astronomy, using two red LED ' s to preserve night vision better than red filters or other dev i ces. Brightness is adjust able. Operates on a single 9 volt battery (included).
47 Appendix A – Technical Specifications Advanced Series 21021 / 21022 21026 / 21027 Specifications: Optical Design 80mm (3.2") refractor 100mm (4") refractor Focal Length 600mm F/7.5 900mm F/9 Finderscope 6x30 9x50 Mount CG-5 Equatorial CG-5 Equatorial Eyepiece 20mm – 1.
48 Appendix B - Glossary of Terms A - Absolute magnitude The apparent magnit ude that a star would have if it were observed from a standard distance of 10 parsecs, or 32.6 light-years. The absolute magnitu de of the Sun is 4. 8. at a distance of 10 parsecs, it would just be visible on Earth on a clear moonless night away from surface light.
49 J - Jovian Planets Any of the four gas giant planets tha t are at a greater distance for m the sun than the terrestrial planets. K - Kuiper Belt A region beyond the orbit of Neptune extend ing to about 1000 AU which is a source of many short period comets.
50 telescope at this rate. The rate is 15 ar c seconds per second or 15 degrees per hour. T - Terminator The boundary line between the light and dark por tion of the moon or a planet. U - Universe The totality of astronomi cal things, events, relatio ns and en ergies capable of being described objectively.
51 A A P P P P E E N N D D I I X X C C L L O O N N G G I I T T U U D D E E S S A A N N D D L L A A T T I I T T U U D D E E S S LONGITUDE LATITUDE degrees min degrees min AL ABAM A Anniston 85 51 33 34.8 Auburn 85 26.4 32 40.2 Birmingham 86 45 33 34.2 Centreville 87 15 32 54 Dothan 85 27 31 19.
52 LONGITUDE LATITUDE degrees min degrees min Melbourne 80 37.8 28 6 Miami 80 16.8 25 49.2 Naples 81 4.8 26 7.8 Nasa Shuttle 80 40.8 28 37.2 Orlando 81 19.2 28 25.8 Panama City 85 40.8 30 12 Patrick AFB 80 3.6 28 13.8 Pensacola 87 19.2 30 21 Ruskin 82 3.
53 LONGITUDE LATITUDE degrees min degrees min Wurtsmith 83 2.4 44 27 Ypsilanti 83 31.8 42 13.8 MINNESOTA Albert Lea 93 22.2 43 40.8 Alexandria 95 22.8 45 52.2 Bemidji Muni 94 55.8 47 30 Brainerd-Crw 94 7.8 46 24 Detroit Laks 95 52.8 46 49.2 Duluth 92 10.
54 LONGITUDE LATITUDE degrees min degrees min OKLAHOMA Altus AFB 99 16.2 34 40.2 Ardmore 97 1.2 34 18 Bartlesville 96 0 3 6 45 Clinton 99 1 .2 35 21 Enid 97 4.8 36 22.8 Fort Sill 98 2 .4 34 39 Gage 99 46.2 36 18 Hobart 99 3 35 0 Lawton 98 25.2 34 34.2 Mcalester 95 46.
55 LONGITUDE LATITUDE degrees min degrees min Walla Walla 118 16.8 46 6 Wenatchee 120 1.2 47 24 Whidbey Is 122 39 48 21 Yakima 120 31.8 46 34.2 WEST VIRGINIA Beckley 81 7.2 37 46.8 Bluefield 81 13.2 37 18 Charleston 81 3.6 38 22.2 Clarksburg 80 13.8 39 16.
56 Appendix D - RS-232 Connection You can control your telescope with a computer via the RS-232 port on the computerized hand control and using an optional RS-232 cable (#93920). Once connected , the telesc ope can be controlled using popular astronomy software programs.
57 Additional RS232 Commands S S e e n n d d A A n n y y T T r r a a c c k k R R a a t t e e T T h h r r o o u u g g h h R R S S 2 2 3 3 2 2 T T o o T T h h e e H H a a n n d d C C o o n n t t r r o o l l 1. Multiply the desired tracking rate (arcseconds/second) b y 4.
58 APPENDIX E – MAPS OF TIME ZONES.
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66 CELESTRON TWO YEAR WARRANTY A. Celestron wa rrants this telescope to be free from defects in materials and workma nship for two years. Celest ron will repa ir or replace such product or part thereof which, upon inspe ction by Celestron, is found to be defective in materials or workmanship .
Celestron 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212 -5835 Web site at http//www.celestron.com Copyright 2003 Celestron All rights reserved. (Products or instructions may change without notice o r obligation.) Item # 21021-INST Printed in China $10.
An important point after buying a device Celestron C80ED-R (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Celestron C80ED-R 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 Celestron C80ED-R - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Celestron C80ED-R you will learn all the available features of the product, as well as information on its operation. The information that you get Celestron C80ED-R will certainly help you make a decision on the purchase.
If you already are a holder of Celestron C80ED-R, 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 Celestron C80ED-R.
However, one of the most important roles played by the user manual is to help in solving problems with Celestron C80ED-R. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Celestron C80ED-R 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
