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Advanced Series
Advanced Series
Advanced Series GT
Advanced Series GT
GT
INSTRUCTION MANUAL
C5-S ● C8-S ● C9.25-S
C5-S ● C8-S ● C9.25-S
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INTRODUCTION ........................................................................................................................................................................... 4 Warning......................................................................................................................................................................4 ASSEMBLY................................................................................................................................
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Autoguide Rates ...............................................................................................................................................26 Azimuth Limits.................................................................................................................................................26 East/West Filtering ...........................................................................................................................................27 Utility Fea
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Congratulations on your purchase of the Celestron Advanced Series telescope (AST)! The Advanced Series of telescopes come in standard (non-computerized) and computerized GT models. The Advanced Series is made of the highest quality materials to ensure stability and durability. All this adds up to a telescope that gives you a lifetime of pleasure with a minimal amount of maintenance. Furthermore, your Celestron telescope is versatile — it will grow as your interest grows. The Advan
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Figure 2. 1 – Advanced Series (Advanced C8-S Shown) ASSE 1 12 2 3 11 10 4 5 9 8 6 7 1 Optical Tube 7 Tripod 2 Finderscope 8 Counterweight(s) 3 Finderscope Bracket 9 Counterweight Bar 4 Equatorial Mount 10 Declination Setting Circle 5 Latitude Adjustment Scale 11 Dovetail Mounting Bar 6 Tripod Center Leg Brace/Accessory Tray 12 Schmidt Corrector Lens 5
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Figure 2.2 – Advanced Series GT (Advanced C8-SGT Shown) 1 2 12 3 11 15 4 10 14 5 9 A B 13 8 C 6 E 7 D 1 Optical Tube 9 Counterweight Bar 2 Finderscope 10 Declination Setting Circle 3 Finderscope Bracket 11 Dovetail Mounting Bar 4 Equatorial Mount 12 Schmidt Corrector Lens 5 Latitude Adjustment Scale 13 Hand Control 6 Tripod Center Leg Brace/Accessory Tray 14 R.A. Motor Drive / Control Panel
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This section covers the assembly instructions for your Celestron Advanced Series Telescope (AST). Your AST telescope should be set up indoor the first time so that it is easy to identify the various parts and familiarize yourself with the correct assembly procedure before attempting it outdoor. #11071 / 11072 #11025 / 11026 #11045 / 11046 C5-S C8-S C9.25-S Diameter 127mm (5") Schmidt-Cassegrain 203mm (8") Schmidt-Cassegrain 235mm (9.25") Schmidt-Cassegrain Focal Length 1250m
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A At tt ta ac ch hiin ng g t th he e E Eq qu ua at to or riia all M Mo ou un nt t The equatorial mount allows you to tilt the telescope’s axis of rotation so that you can track the stars as they move across the sky. The CG-5 mount is a German equatorial mount that attaches to the tripod head. On one side of the tripod head there Equatorial is a metal alignment peg for aligning the mount. This side of Mount the tripod will face north when setting up for an astronomical observ
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Installing the Counterweight Installing the Counterweight Depending on which AST telescope you have, you will receive either one or two counterweights. To install the counterweight(s): 1. Orient the mount so that the counterweight bar points toward the ground . Counterweight Bar 2. Remove the counterweight safety screw on the end of the counterweight bar (i.e., opposite the end that attaches to the mount). Locking Screw 3. Loosen the locking screw on the side of the counterwe
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shafts, one on either side of the mount. It makes no difference which shaft you use since both work the same. Use whichever one you find more convenient. If, after a few observing sessions, you find the R.A. slow motion knob is more accessible from the other side, pull firmly to remove the knob, then install it on the opposite side. 5. The DEC slow motion knob attaches in the same manner as the R.A. knob. The shaft that the DEC slow motion knob fits over is toward the top of the mount
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3. Hold the visual back with the set screw in a convenient position and rotate the knurled slip ring clockwise until tight. Once this is done, you are ready to attach other accessories, such as eyepieces, diagonal prisms, etc. If you want to remove the visual back, rotate the slip ring counterclockwise until it is free of the rear cell. IIn ns st ta alllliin ng g t th he e S St ta ar r D Diia ag go on na all The star diagonal is a prism that diverts the light at a right angle
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Finderscope Finder Bracket Rubber O-ring Three Nylon Tipped Thumbscrews (10-24x1/2") Two Phillips Head Screws (8-32x1/2") To install the finderscope: 1. Attach the bracket to the optical tube. To do this, Finderscope place the curved portion of the bracket with the slot over the two holes in the rear cell. The Nylon bracket should be oriented so that the rings that Adjustment hold the finder are over the telescope tube, not the Screw rear cell (see Fig 2-11). Sta
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Both the R.A. and DEC axis have lock levers to clutch down each axis of the telescope. To loosen the clutches on the telescope, rotate the lock levers counterclockwise. B Ba alla an nc ciin ng g T Th he e M Mo ou un nt t iin n R R..A A.. To eliminate undue stress on the mount, the telescope should be properly balanced around the polar axis. Proper balancing is crucial for accurate tracking. To balance the mount: 1. Verify that the telescope is securely attached to the teles
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3. Loosen the DEC clutch lock lever and rotate the telescope until the tube is parallel to the ground. 4. Release the tube — GRADUALLY — to see which way it rotates around the declination axis. DO NOT LET GO OF THE TELESCOPE TUBE COMPLETELY! 5. Slightly loosen the knobs that holds the telescope to the mounting platform and slide the telescope either forward or backward until it remains stationary when the DEC clutch is loose. Do NOT let go of the telescope tube while the knob on th
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azimuth housing. While standing behind the telescope, the knobs are on the front of the mount. Turning the right adjustment knob clockwise moves the mount toward the right. Turning the left adjustment knob clockwise moves the mount to the left. Both screws push off of the peg on the tripod head, which means you may have to loosen one screw while tightening the other. The screw that holds the equatorial mount to the tripod may have to be loosened slightly. Keep in mind that ad
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The Advanced Series GT, computerized version of each telescope has a hand controller designed to give you instant access to all the functions that your telescope has to offer. With automatic slewing to over 40,000 objects, and common sense menu descriptions, even a beginner can master its variety of features in just a few observing sessions. Below is a brief description of the individual components of the computerized hand controller: 1. Liquid Crystal Display (LCD) Window: Has
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4. 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 control contains the following catalogs in its database: Messier – Complete list of all Messier objects. NGC – Complete list of all the deep-sky objects in the Revised New General Catalog. Caldwell – A combination of the best NGC and IC objects. Planets - All 8 planets in our Solar System plus the Moon. Stars – A compiled list of the brightest
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Alignment Procedures Alignment Procedures In order for the telescope to accurately point to objects in the sky, it must first be aligned to three known positions (stars) in the sky. With this information, the telescope can create a model of the sky, which it uses to locate any object with known coordinates. There are many ways to align your telescope with the sky depending on what information the user is able to provide: Auto Align allows the telescope to select three stars and uses
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4. Select one of the four alignment methods as described below. Note: 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 correct data. Auto Align Auto Align Auto Align allows the telescope to automatically choose three stars (two on one side of the Meridian, and one on the opposite side) on which to align itself. To Auto Align your telescope: 1. Select Auto Align from the alignment choices
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the eyepiece, pressing ENTER when complete. NOTE: Although the telescope allows the user to select the alignment stars, for best all-sky pointing accuracy it is still necessary to select two alignment stars on one side of the Meridian and the third star on the opposite side of the Meridian. For this reason, the hand control will only display stars that are on the same side of the Meridian for the first two alignment stars, then will only display stars on the opposite side of the Meridian
