Celestron Advanced Series C8-N Manuel d'utilisateur

1 AAddvvaanncceedd SSeerriieess AAddvvaanncceedd SSeerriieess GGGTTT IINNSSTTRRUUCCTTIIOONN MMAANNUUAALL CC88--NN // CC88--NNGG

10The knob is a tension fit, so sliding it on holds it in place. As mentioned above, there are two R.A. shafts, one on either side of the mount.

11 IInnssttaalllliinngg tthhee FFiinnddeerrssccooppee To install the finderscope onto the telescope you must first mount the finderscope throu

12the eyepiece out. You can replace it with another ocular. Eyepieces are commonly referred to by focal length which is printed on the eyepiece

135. Loosen the screws that hold the telescope tube inside the mounting rings and slide the telescope either forwards or backwards until it remai

14For Advanced GT users, it may be helpful to remove the front latitude adjustment screw completely. This will allow the mount to reach lower lati

15 The Advanced Series GT, computerized version of each telescope has a hand controller designed to give you instant access to all the functions

164. Catalog Keys: The Advanced Series has keys on the hand control to allow direct access to each of the catalogs in its database. The hand co

17AAlliiggnnmmeenntt PPrroocceedduurreess In order for the telescope to accurately point to objects in the sky, it must first be aligned to th

18Note: If incorrect information is entered into the hand control, the UNDO button acts like a back space button allowing the user to re-enter the

19NOTE: Although the telescope allows the user to select the alignment stars, for best all-sky pointing accuracy it is still necessary to select t

2 INTRODUCTION...

20OObbjjeecctt CCaattaalloogg Selecting an Object Now that the telescope is properly aligned, you can choose an object from any of the catalog

21Tour Mode The Advanced Series telescopes include a tour feature which automatically allows the user to choose from a list of interesting object

22 1 = .5x 6 = 64x 2 = 1x (sidereal) 7 = .5º / sec 3 = 4x 8 = 2º / sec 4 = 8x 9 = 3º / sec 5 = 16x SSeettuupp PPrro

23that is not included in the regular database. There are several ways to save an object to memory depending on what type of object it is: GoTo

24 Note: Some of the databases contain thousands of objects, and can therefore take several minutes to return the closest objects. Precise GoTo

25example, if you are observing from a mountainous location where the horizon is partially obscured, you can set your minimum altitude limit to re

26in R.A. (azimuth) until it reaches the point that the cables are extended to their maximum. Then by displaying the telescopes azimuth in this po

27should be. Use the equatorial head latitude and azimuth adjustments to place Polaris in the center of the eyepiece. Do not use the direction b

28EQ NORTHEQ SOUTHOFFMODESIDEREALSOLARLUNARRATETRACKINGVIEW TIME-SITESETUP TIME-SITEANTI-BACKLASHFILTER LIMITSDIRECTION BUTTONSGOTO APPROACHAUTOGU

29 A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is focused. Some

3TELESCOPE BASICS ...

30Actual image orientation as seen with the unaided eye Upside-down image, as viewed though a Newtonian telescope FFooccuussiinngg

31 Focal Length of Telescope (mm) Magnification =  Focal Length of Eyepiece (mm) Let’s say, for example, y

32 Up to this point, this manual covered the assembly and basic operation of your telescope. However, to understand your telescope more thorough

33MMoottiioonn ooff tthhee SSttaarrss The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily t

34Latitude Scales The easiest way to polar align a telescope is with a latitude scale. Unlike other methods that require you to find the celest

35Remember, while Polar aligning, do NOT move the telescope in R.A. or DEC. You do not want to move the telescope itself, but the polar axis. T

36DDeecclliinnaattiioonn DDrriifftt MMeetthhoodd ooff PPoollaarr AAlliiggnnmmeenntt This method of polar alignment allows you to get t

37 With your telescope set up, you are ready to use it for observing. This section covers visual observing hints for both solar system and deep

38 For safe solar viewing, use a solar filter that reduces the intensity of the Sun's light, making it safe to view. With a filter you can

39disturbances vary from time-to-time and place-to-place. The size of the air parcels compared to your aperture determines the "seeing"

4 Congratulations on your purchase of the Celestron Advanced Series telescope (AST)! The Advanced Series of telescopes come in standard (non-com

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 telesco

41 6. Find a suitable guide star in the telescope eyepiece field of view. This is relatively easy since you can search a wide area without affe

42Lunar 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

43AAuuttoo GGuuiiddiinngg The Advanced GT telescope has a designated auto guiding port for use with a CCD autoguider. The diagram below may b

44 While your telescope requires little maintenance, there are a few things to remember that will ensure your telescope performs at its best.

45If you have an eyepiece in the focuser, remove it. Rack the focuser tube in completely, using the focusing knobs, until its silver tube is no

46Figure 8-2 A collimated telescope should appear as a symmetrical ring pattern similar to the diffraction disk seen here. Night Time Star Col

47IMPORTANT: After making the first, or each adjustment, it is necessary to re-aim the telescope tube to re-center the star again in the center

48 You will find that additional accessories enhance your viewing pleasure and expand the usefulness of your telescope. For ease of reference, all

49Series 3 – #94119-30 Light Red, Blue, Green, ND50% T (#s 23A, 38A, 58, 96ND-50) Series 4 – #94119-40 Yellow, Deep Yellow, Violet, Pale Blue (#s 8,

5 Fig 1-1 - The Advanced Series Newtonian (C8-N Shown) 1. Finderscope 7. 2" Steel Tripod 2. Finderscope Bracket 8. Center Leg Br

50RS-232 Cable (#93920) – Allows your Advanced Series telescope to be controlled using a laptop computer or PC. Once connected, the telescope can be

51Appendix A – Technical Specifications Advanced Series 31061 / 31062 11047 / 11048 C8-N C10-N Specifications: Optical Design 200mm (8.

52Appendix B - Glossary of Terms A- Absolute magnitude The apparent magnitude that a star would have if it were observed from a standard dist

53J - Jovian Planets Any of the four gas giant planets that are at a greater distance form the sun than the terrestrial planets. K - Kuiper Belt

54telescope at this rate. The rate is 15 arc seconds per second or 15 degrees per hour. T - Terminator The boundary line between the light and

55AAPPPPEENNDDIIXX CC LLOONNGGIITTUUDDEESS AANNDD LLAATTIITTUUDDEESS LONGITUDE LATITUDE degrees min degrees min ALABAMA Annist

56 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

57 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

58 LONGITUDE LATITUDE degrees min degrees min OKLAHOMA Altus AFB 99 16.2 34 40.2 Ardmore 97 1.2 34 18 Bartlesville 96 0 36 45 Cl

59 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 3

6 Fig 1-2 - The Advanced Series GT Newtonian (C8-NGT Shown) 1. Finderscope 8. Center Leg Brace / Accessory Tray 2. Finderscope Bracket 9.

60Appendix D - RS-232 Connection You can control your telescope with a computer via the RS-232 port on the computerized hand control and using

61Additional RS232 Commands SSeenndd AAnnyy TTrraacckk RRaattee TThhrroouugghh RRSS223322 TToo TThhee HHaanndd CCoonnttrrooll 1. Multipl

62 APPENDIX E – MAPS OF TIME ZONES

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7 This section covers the assembly instructions for your Celestron Advanced Series Telescope (AST). Your AST telescope should be set up indoor t

70CELESTRON TWO YEAR WARRANTY A. Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestro

Celestron 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212-5835 Web site at http//w

8 1. Locate the azimuth adjustment screws on the equatorial mount. 2. Retract the screws so they no longer extend into the azimuth housing on t

9IInnssttaalllliinngg tthhee CCoouunntteerrwweeiigghhtt Depending on which AST telescope you have, you will receive either two or three count