Celestron CGE800, CGE925, CGE1100, CGE1400 Installing the Star Diagonal, Installing the Eyepiece

Page 10

Installing the Star Diagonal

The star diagonal is a prism that diverts the light at a right angle to the light path of the telescope. This allows you to observe in positions that are physically more comfortable than if you looked straight through. To attach the star diagonal onto a CGE 800, 925 or 1100:

1.Turn the set screw on the visual back until its tip no longer extends into (i.e., obstructs) the inner diameter of the visual back.

2.Slide the chrome portion of the star diagonal into the visual back.

3.Tighten the set screw on the visual back to hold the star diagonal in place.

If you wish to change the orientation of the star diagonal, loosen the set screw on the visual back until the star diagonal rotates freely. Rotate the diagonal to the desired position and tighten the set screw.

The CGE 1400 comes with a 2" mirror diagonal that attaches directly onto the rear threads of the 14" optical tube. See figure 2-6.

2" Barrel

Eyepiece

2" thread-on Mirror Diagonal

Eyepiece

Star Diagonal

Visual Back

Figure 2-6

Figure 2-7

 

 

Installing the Eyepiece

The eyepiece, or ocular, is an optical element that magnifies the image focused by the telescope. The eyepiece fits into either the visual back directly, the star diagonal, or the 2" mirror diagonal. To install an eyepiece:

1.Loosen the set screw on the star diagonal until the tip no longer extends into the inner diameter of the eyepiece end of the diagonal.

2.Slide the chrome portion of the eyepiece into the star diagonal.

3.Tighten the set screw on the star diagonal to hold the eyepiece in place.

To remove the eyepiece, loosen the set screw on the star diagonal and slide the eyepiece out. You can replace it with another eyepiece (purchased separately).

NOTE: The 2" mirror diagonal has a 1 1/4" eyepiece adapter to use 1 1/4" eyepieces. You may remove the adapter to use 2" eyepieces.

Eyepieces are commonly referred to by focal length and barrel diameter. The focal length of each eyepiece is printed on the eyepiece barrel. The longer the focal length (i.e., the larger the number) the lower the eyepiece power and the shorter the

10

Image 10
Contents CGE800 CGE925 CGE1100 CGE1400 User Defined Objects Telescope Maintenance Some of the many standard features of the CGE include CGE 1400 Shown 12v Output JackCounterweight Setting up the TripodPower Supply DiagonalAttaching the Center Leg Brace Attaching the Electronics PierCounterweight Locking Screw Safety Screw Washer Installing the Counterweight BarInstalling the Counterweight Attaching the Equatorial MountAttaching the Visual Back Attaching the Optical Tube to the MountDovetail Slide Bar Dovetail Locking Knobs Mounting Platform Installing the Star Diagonal Installing the EyepieceInstalling the Finderscope Adjusting the Mount Moving the Telescope ManuallyBalancing The Mount in R.A Balancing The Mount in DECAttaching the Motor Cables Powering the TelescopeTransporting the CGE Page CGE Hand Control Double Stars Named StarsNamed Objects Variable StarsAlignment Procedures Startup ProcedureAuto Two-Star Align Auto One-Star AlignLast Alignment Quick-AlignCGE Re-Alignment Slewing to an Object Object CatalogSelecting an Object Finding PlanetsDirection Buttons Tour ModeConstellation Tour Rate ButtonSetup Procedures Identify Scope Setup Features Precise GoToObserving Tip Helpful Hint Utility Features Helpful Hint Page CGE Ready Image Orientation Calculating Magnification FocusingDetermining Field of View General Observing Hints Celestial Coordinate System Motion of the Stars Latitude Scales Pointing at PolarisFinding the North Celestial Pole Declination Drift Method of Polar Alignment Observing the Planets Observing the MoonLunar Observing Hints Planetary Observing HintsObserving Deep Sky Objects Observing the SunSolar Observing Hints Seeing ConditionsSeeing Short Exposure Prime Focus Photography Eyepiece Projection FullLong Exposure Prime Focus Photography Planet ISO Moon Mercury Venus Mars Jupiter SaturnPeriodic Error Correction PEC Using Periodic Error Correction Reducing Vibration Terrestrial PhotographyMetering CCD ImagingFastar Compatible Optical System Fastar F/2 Imaging Medium size to small galaxies With Reducer/CorrectorPlanetary or Lunar Auto Guiding Care and Cleaning of the Optics CollimationCollimated telescope Should appear Symmetrical with Page At f/10 and 163 power with the CGE Page Technical Specifications Idle Current Appendix a Longitudes Latitudes Georgia Minnesota Rhode Island Canada Appendix B RS-232 Connection Communication ProtocolAdditional RS232 Commands Reset The Position Of Azm Or AltAppendix C Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty