Celestron 11055, 91525, 11065 instruction manual Installing Counterweight Bar

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Installing the

Counterweight Bar

HINT

Installing the

Counterweight

Counterweight

Bar

Counterweight

Figure 2-7

To properly balance the telescope, the mount comes with a counterweight bar and one counterweight (the CM-1400 comes with two counterweights). The counterweight bar is located in the same box as the Equatorial Mount Head — in a cutout along the bottom of the shipping box. To install the counterweight bar:

1.Locate the opening in the equatorial mount on the DEC axis (see figure 2- 6). It is opposite the telescope mounting platform.

2.Thread the counterweight bar into the opening until tight.

Once the bar is securely in place you are ready to attach the counterweight.

Since the fully assembled telescope is quite heavy, position the mount so that the tripod leg with the counterweight bar over it is pointing towards north before the tube assembly and counterweights are at- tached. This will make the polar alignment procedure much easier.

Counterweight

Bar

Counterweight Bar

Safety Screw

Figure 2-5

Figure 2-6

The Celestron CM-1100 comes standard with one 23 pound counterweight. The CM-1400 comes with two 25 pound counterweights. To install the counterweight(s):

1.Orient the mount so that the counterweight bar points toward the ground (see figure 2-7).

2.Remove the counterweight safety thumbscrew and washer on the end of the counterweight bar (i.e., opposite the end that attaches to the mount).

3.Loosen the set screw on the side of the counterweight.

4.Slide the counterweight onto the shaft.

5.Tighten the locking screw on the side of the weight to hold the counter- weight in place.

6.Replace the counterweight safety thumbscrew and washer.

Assembling Your CM-1100 • 9

Image 13
Contents Page E C e l e s t r o n C M- 11 00/1400 B L E O F C O N T E N T S Iv Table of Contents T R O D U C T I O N How to Use This Manual Word of Caution Schmidt-Cassegrain Optical System Unpacking Your Celestron CM-1100 S E M B L I N G Y O U R C M 1 1 0CM-1100 Setting Up the Tripod Central Column Electronics Console Center Leg Brace Attaching the Center Leg Brace Attaching the Central ColumnAttaching the Equatorial Mount Installing Counterweight Installing Counterweight BarAttaching the Optical Tube to the Mount Attaching the Visual Back Installing the Star Diagonal Assembling Your CM-1100 Installing the Finder Installing the Polar Finder Moving the Telescope in R.A. and DEC Adjusting the Mount Balancing the Mount in R.A Balancing the Mount in DEC Assembling Your CM-1100 Technical Specifications Tripod Image Orientation L E S C O P E B a S I C SFocusing General Photography Hints Aligning the Finder Daytime Observing Your First LookNighttime Observing Calculating Magnification Determining Field of View Celestial Coordinate System T R O N O M Y B a S I C SMotion of the Stars Definition Polar AlignmentFinding the Pole Latitude Scales Pointing at Polaris Polar Axis Finder Declination Drift Aligning the R.A. Setting Circle Setting the DEC Circle I N G T H E D R I V E Powering Up the DriveGuide Speed BC Backlash Correction Periodic Error Correc- tionHC/CCD Hand Controller Northern/Southern Hemisphere OperationAutoguiding DEC ReverseObserving the Moon L E S T I a L O B S E R V I N GObserving the Sun Observing Deep-Sky Objects Using Your Setting CirclesStar Hopping Celestial Observing Transparency Viewing ConditionsSky Illumination Seeing ConditionsCelestial Observing L E S T I a L P H O T O G R a P H Y Short Exposure Prime Focus Lunar Phase ISO Crescent QuarterFull Celestial Photography Piggyback Celestial Photography Eyepiece Projection Planet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus Celestial Photography CCD Imaging Description of F-numbers Fastar ConfigurationMedium size to small galaxies Imaging at f/7 Imaging at f/11Lunar or small planetary nebulae Planetary or Lunar Imaging at f/22L E S C O P E M a I N T E N a N C E Care and Cleaning of the Optics CollimationTelescope Maintenance Telescope Maintenance T I O N a L a C C E S S O R I E S Optional Accessories Optional Accessories Optional Accessories Mag Type Proper Name ConstNGC# Spiral Galaxy Magnitude Epoch Star Name ConstellationAtlases Astronomy TextsGeneral Observational Astronomy Visual ObservationCelestron ONE Year Warranty