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INTRODUCTION.......................................................................................................................................................................................................... 4

 

Warning ....................................................................................................................................................................................................................... 4 

ASSEMBLY.................................................................................................................................................................................................................... 7

 

Setting up the Tripod................................................................................................................................................................................................... 7 
Attaching the Equatorial Mount.................................................................................................................................................................................. 8 
Attaching the Center Leg Brace.................................................................................................................................................................................. 8 
Installing the Counterweight Bar ................................................................................................................................................................................ 8 
Installing the Counterweight....................................................................................................................................................................................... 9 
Attaching the Hand Control Holder............................................................................................................................................................................ 9 
Attaching the Slow Motion Knobs ............................................................................................................................................................................. 9 
Attaching the Optical Tube to the Mount ................................................................................................................................................................. 10 
Attaching the Visual Back ........................................................................................................................................................................................ 10 
Installing the Star Diagonal....................................................................................................................................................................................... 11 
Installing the Eyepiece .............................................................................................................................................................................................. 11 
Installing the Finderscope ......................................................................................................................................................................................... 12 
Removing the Lens Cap ............................................................................................................................................................................................ 13 
Moving the Telescope Manually .............................................................................................................................................................................. 13 
Balancing The Mount in R.A.................................................................................................................................................................................... 13 
Balancing The Mount in DEC .................................................................................................................................................................................. 14 
Adjusting the Mount ................................................................................................................................................................................................. 14 

Adjusting the Mount in Altitude ............................................................................................................................................................................... 14 
Adjusting the Mount in Azimuth .............................................................................................................................................................................. 15 

Attaching the Declination Cable (For GT Models Only) ......................................................................................................................................... 15 
Powering the Telescope ............................................................................................................................................................................................ 16 

HAND CONTROL....................................................................................................................................................................................................... 17

 

Hand Control Operation ............................................................................................................................................................................................ 18 

Alignment Procedures............................................................................................................................................................................................... 19 
Startup Procedure ...................................................................................................................................................................................................... 19 
Auto Align................................................................................................................................................................................................................. 20 
Auto Three-Star Align .............................................................................................................................................................................................. 20 
Quick-Align............................................................................................................................................................................................................... 21 
Last Alignment.......................................................................................................................................................................................................... 21 
Re-Alignment ............................................................................................................................................................................................................ 21 
Object Catalog........................................................................................................................................................................................................... 22 

Selecting an Object.................................................................................................................................................................................................... 22 
Slewing to an Object ................................................................................................................................................................................................. 22 
Finding Planets .......................................................................................................................................................................................................... 22 
Tour Mode ................................................................................................................................................................................................................. 23 
Constellation Tour ..................................................................................................................................................................................................... 23 
Direction Buttons....................................................................................................................................................................................................... 23 
Rate Button ................................................................................................................................................................................................................ 23 

Setup Procedures ....................................................................................................................................................................................................... 24 

Tracking Mode ................................................................................................................................................................................................ 24 
Tracking Rate .................................................................................................................................................................................................. 24 
Date/Time........................................................................................................................................................................................................ 24 
User Defined Objects ...................................................................................................................................................................................... 24 
Get RA/DEC ................................................................................................................................................................................................... 25 
Goto R.A/Dec.................................................................................................................................................................................................. 25 
Identify ............................................................................................................................................................................................................ 25 

Precise GoTo ............................................................................................................................................................................................................. 26 
Scope Setup Features................................................................................................................................................................................................. 26 

Setup Time-Site............................................................................................................................................................................................... 26 
Anti-backlash .................................................................................................................................................................................................. 26 
Filter Limits..................................................................................................................................................................................................... 26 
Direction Buttons ............................................................................................................................................................................................ 27 
Goto Approach ................................................................................................................................................................................................ 27 
Autoguide Rates .............................................................................................................................................................................................. 27 
Azimuth Limits ............................................................................................................................................................................................... 27 
East/West Filtering.......................................................................................................................................................................................... 28 

Utility Features .......................................................................................................................................................................................................... 28 

Calibrate Goto ................................................................................................................................................................................................. 28 
Home Position ................................................................................................................................................................................................. 28 
Polar Align ...................................................................................................................................................................................................... 28 
Light Control ................................................................................................................................................................................................... 29 
Factory Settings............................................................................................................................................................................................... 29 
Version ............................................................................................................................................................................................................ 29 

Summary of Contents for C11-SGT

Page 1: ...A Ad dv va an nc ce ed d S Se er ri ie es s A Ad dv va an nc ce ed d S Se er ri ie es s G G GT T T INSTRUCTION MANUAL C C6 6 S S C C8 8 S S C C9 9 2 25 5 S S C C1 11 1 S S...

Page 2: ...g the Declination Cable For GT Models Only 15 Powering the Telescope 16 HAND CONTROL 17 Hand Control Operation 18 Alignment Procedures 19 Startup Procedure 19 Auto Align 20 Auto Three Star Align 20 Qu...

Page 3: ...erving the Planets 39 Observing the Sun 39 Solar Observing Hints 40 Observing Deep Sky Objects 40 Seeing Conditions 40 Transparency 40 Sky Illumination 40 Seeing 40 ASTROPHOTOGRAPHY 42 Short Exposure...

Page 4: ...features The AST s deluxe features combine with Celestron s legendary Schmidt Cassegrain optical system to give amateur astronomers the most sophisticated and easy to use telescopes available on the m...

Page 5: ...pe 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...

Page 6: ...rcle 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...

Page 7: ...ories Equatorial Mount Tripod Hand Control Counterweight s and Counterweight Bar equatorial mount with motors comes in separate box for GT models Remove all the pieces from their respective boxes and...

Page 8: ...lush 5 Tighten the knob attached to the central rod on the underside of the tripod head to hold the equatorial mount firmly in place A At tt ta ac ch hi in ng g t th he e C Ce en nt te er r L Le eg g...

Page 9: ...s O On nl ly y The Advanced GT telescope models come with a hand control holder to place the computerized hand control The hand control holder comes in two pieces the leg clamp that snaps around the t...

Page 10: ...sure that the declination and right ascension clutch knobs are tight This will ensure that the mount does not move suddenly while attaching the telescope To mount the telescope tube In order for the...

Page 11: ...on the visual back until the star diagonal rotates freely Rotate the diagonal to the desired position and tighten the set screw I In ns st ta al ll li in ng g t th he e E Ey ye ep pi ie ec ce e The ey...

Page 12: ...thumbscrews that hold the finder in place inside the bracket Tighten the screws until the nylon heads are flush with the inner diameter of the bracket ring Do NOT thread them in completely or they wi...

Page 13: ...telescope is securely attached to the telescope mounting platform 2 Loosen the R A lock lever and position the telescope off to one side of the mount The counterweight bar will extend horizontally on...

Page 14: ...escope so that the counterweight bar is pointing down before loosening the mounting platform screw 6 Tighten the knobs on the telescope mounting platform to hold the telescope in place Like R A balanc...

Page 15: ...ve it For fine adjustments in azimuth 1 Turn the azimuth adjustment knobs located on either side of the azimuth housing see Fig 2 14 While standing behind the telescope the knobs are on the front of t...

Page 16: ...or 12v AC adapter simply plug the round post into the 12v outlet on the electronic panel and plug the other end into your cars cigarette lighter outlet or portable power supply see Optional Accessori...

Page 17: ...the individual components of the computerized hand controller 1 Liquid Crystal Display LCD Window Has a dual line 16 character display screen that is backlit for comfortable viewing of telescope infor...

Page 18: ...constellations 5 Info Displays coordinates and useful information about objects selected from the Advanced GT database 6 Tour Activates the tour mode which seeks out all the best objects for the curre...

Page 19: ...inue 3 The hand control will then display the last entered local time date time zone longitude and latitude Use the Up Down keys 10 to view the current parameters Press ENTER to accept the current par...

Page 20: ...ight star on the opposite side of the Meridian and slew to it Once again center the star in the crosshairs of the finderscope and then center the star in the eyepiece pressing ENTER when complete When...

Page 21: ...recall the last stored index positions to continue using the alignment that was saved when the telescope was last powered down This is a useful feature should your telescope accidentally lose power or...

Page 22: ...rdized catalogs For example to find the Orion Nebula press the M key and enter 042 Slewing to an Object Once the desired object is displayed on the hand control screen choose from the following option...

Page 23: ...trol the telescope s motion in altitude up and down and azimuth left and right The telescope can be controlled at nine different speed rates Rate Button Pressing the RATE key 11 allows you to instantl...

Page 24: ...of the Earth by moving the telescope at the same rate as the rotation of the Earth but in the opposite direction When the telescope is polar aligned this can be accomplished by moving the telescope in...

Page 25: ...again to save this object to the database To replace the contents of any of the user defined objects simply save a new object using one of the existing identification numbers the telescope will replac...

Page 26: ...amount of compensation applied when you press the button in order to get the gears moving quickly without a long pause Negative is the amount of compensation applied when you release the button windin...

Page 27: ...oach will need to be reversed To change the Goto approach direction simply choose Goto Approach from the Scope Setup menu select either Altitude or Azimuth approach choose positive or negative and pre...

Page 28: ...to Calibration calculates the amount of distance and time it takes for the mount to complete its final slow goto when slewing to an object Changing the balance of the telescope can prolong the time it...

Page 29: ...ompletely powered down and still retain its alignment when turned back on This not only saves power but is ideal for those that have their telescopes permanently mounted or leave their telescope in on...

Page 30: ...ENTER RA DEC SAVE LAND OBJ GOTO LAND OBJ USER OBJECTS GET RA DEC GOTO RA DEC SELECT CATALOG IDENTIFY GOTO TYPE PRECISE GOTO MENU SET TO INDEX ENTER TIME DLS ST TIME ZONE ENTER DATE MM DD YY CENTER STA...

Page 31: ...Schmidt Cassegrain system consists of a zero power corrector plate a spherical primary mirror and a secondary mirror Once light rays enter the optical system they travel the length of the optical tub...

Page 32: ...bs connect a screw to the primary mirror mounting plate and prevent the mirror from moving when locked down These screws should be locked down when transporting the telescope Aligning the Finderscope...

Page 33: ...elds an actual field of 9 or nearly a full degree To convert degrees to feet at 1 000 yards which is more useful for terrestrial observing simply multiply by 52 5 Continuing with our example multiply...

Page 34: ...declination are named for their angular distance above and below the celestial equator The lines are broken down into degrees minutes of arc and seconds of arc Declination readings south of the equato...

Page 35: ...ever set You will never see the stars complete one circle because the sunlight during the day washes out the starlight However part of this circular motion of stars in this region of the sky can be se...

Page 36: ...f the mount is pointing due north Use a landmark that you know faces north 2 Level the tripod There is a bubble level built into the mount for this purpose NOTE Leveling the tripod is only necessary i...

Page 37: ...sa Minor is not one of the brightest constellations in the sky it may be difficult to locate from urban areas If this is the case use the two end stars in the bowl of the Big Dipper the pointer stars...

Page 38: ...he eyepiece points straight up Insert the cross hair eyepiece and align the cross hairs so that one is parallel to the declination axis and the other is parallel to the right ascension axis Move your...

Page 39: ...ilters A yellow filter works well at improving contrast while a neutral density or polarizing filter will reduce overall surface brightness and glare Observing the Planets Other fascinating targets in...

Page 40: ...affect what you can see through your telescope during an observing session Conditions include transparency sky illumination and seeing Understanding viewing conditions and the effect they have on obse...

Page 41: ...ible on the brighter planets like Jupiter and Mars and stars are pinpoint images Under poor seeing conditions images are blurred and stars appear as blobs The conditions described here apply to both v...

Page 42: ...have interchangeable lenses so you can attach it to the telescope and so you can use a variety of lenses for piggyback photography If you can t find a new camera you can purchase a used camera body th...

Page 43: ...f their great distances Moderate to high magnification is therefore required to make the image large enough to see any detail Unfortunately the camera telescope combination alone does not provide enou...

Page 44: ...atio film and some comments on the seeing conditions The following table lists exposures for eyepiece projection with a 10mm eyepiece All exposure times are listed in seconds or fractions of a second...

Page 45: ...ual accessories 3 Thread the Radial Guider onto your telescope 4 Thread the T Ring onto the Radial Guider 5 Mount your camera body onto the T Ring the same as you would any other lens 6 Set the shutte...

Page 46: ...ause vibrations producing blurred photos To reduce vibration when tripping the shutter use a cable release A cable release keeps your hands clear of the camera and lens thus eliminating the possibilit...

Page 47: ...F O V C9 25 S 6 9 x 5 3 arc min 11 x 8 4 arc min Field of view calculated using SBIG ST 237 CCD camera with 4 7mm x 3 6mm chip Auto Guiding The Advanced GT telescope has a designated auto guiding port...

Page 48: ...telescope tube To minimize the need to clean your telescope replace all lens covers once you have finished using it Since the rear cell is NOT sealed the cover should be placed over the opening when n...

Page 49: ...field of view in the same direction that the central obstruction of the star image is skewed 5 While looking through the eyepiece use an Allen wrench to turn the collimation screw you located in step...

Page 50: ...ire field even at the edges In the 1 1 4 barrel diameter they are available in the following focal lengths 4mm 6mm 9mm 12 5mm 15mm 20mm 25mm 32mm and 40mm X Cel This 6 element design allows each X Cel...

Page 51: ...63 power with the C8 S and 188 power with the C9 25 S Moon Filter 94119 A Celestron s Moon Filter is an economical eyepiece filter for reducing the brightness of the moon and improving contrast so gre...

Page 52: ...learning the night sky You wouldn t set off on a road trip without a road map and you don t need to try to navigate the night sky without a map either Even if you already know your way around the majo...

Page 53: ...iew standard eyepiece 83 64 55 61 Linear FOV 1000 yds 43 8 ft 33 6 ft 29 ft 32 ft Optical Coatings Standard Starbright XLT Starbright Coating XLT Starbright Coating XLT Starbright Coating XLT Secondar...

Page 54: ...asured from due north between the astronomical meridian the vertical line passing through the center of the sky and the north and south points on the horizon and the vertical line containing the celes...

Page 55: ...bright at the end of its life cycle O Open Cluster One of the groupings of stars that are concentrated along the plane of the Milky Way Most have an asymmetrical appearance and are loosely assembled T...

Page 56: ...ing Moon The period of the moon s cycle between new and full when its illuminated portion is increasing Z Zenith The point on the Celestial Sphere directly above the observer Zodiac The zodiac is the...

Page 57: ...6 Mather AFB 121 1 8 38 34 2 Mcclellan 121 2 4 38 40 2 Merced 120 31 2 37 16 8 Miramar NAS 117 9 32 52 2 Modesto 120 57 37 37 8 Moffet 122 3 37 25 2 Mojave 118 9 35 3 Montague 122 31 8 41 43 8 Montere...

Page 58: ...wa 92 27 41 6 Sioux City 96 22 8 42 24 Spencer 95 9 43 10 2 Waterloo Mun 92 2 4 42 33 KANSAS Chanute 95 28 8 37 40 2 Col J Jabar 97 13 2 37 45 Concordia 97 39 39 33 Dodge City 99 58 2 37 46 2 Elkhart...

Page 59: ...ercury 116 1 2 36 37 2 Nellis AFB 115 1 8 36 13 8 Owyhee 116 10 2 42 34 8 Reno 119 46 8 39 30 Tonopah 117 4 8 38 4 2 Wildhorse 116 15 41 19 8 Winnemucca 117 4 8 40 54 Yucca Flat 116 4 8 37 34 8 NEW HA...

Page 60: ...101 27 32 18 Brownsville 97 25 8 25 54 Brownwood 98 57 6 31 47 4 Carswell AFB 97 25 8 32 46 8 Chase NAS 97 40 2 28 22 2 Childress 100 16 8 34 25 8 College Stn 96 22 2 30 34 8 Corpus Chrst 97 3 27 46...

Page 61: ...3 25 e 52 30 n Birmingham England 1 55 w 52 25 n Bombay India 72 48 e 19 0 n Bordeaux France 0 31 w 44 50 n Bremen Germany 8 49 e 53 5 n Brisbane Australia 153 8 e 27 29 s Bristol England 2 35 w 51 28...

Page 62: ...d conflicts with slew limits there will be no action Get Azm Alt Z 12AB 4000 10 characters returned 12AB Azm comma 4000 Alt Get RA Dec E 34AB 12CE Scope must be aligned Cancel Goto M Is Goto in Progre...

Page 63: ...oto Command Through RS232 To The Hand Control note Only valid for motorcontrol version 4 1 or greater 1 Convert the angle position to a 24bit number Example if the desired position is 220 then POSITIO...

Page 64: ...64 APPENDIX E MAPS OF TIME ZONES...

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Page 72: ...g or unauthorized repair Further product malfunction or deterioration due to normal wear is not covered by this warranty CELESTRON DISCLAIMS ANY WARRANTIES EXPRESS OR IMPLIED WHETHER OF MERCHANTABILIT...

Page 73: ...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 or obligati...

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