Celestron OMNI XLT 102 manual Attaching the Telescope Tube to the Mount

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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, just below the telescope mounting platform. Once again, you have two shafts to choose from. Use the shaft that is pointing toward the ground. This makes it easy to reach while looking through the telescope, something which is quite important when you are observing but again if it is more convenient for you to use, then reinstall the knob position that suits your needs.

6.Put the polar axis cap over the polar axis. It is held into place by a tension fit.

Attaching the Telescope Tube to the Mount

The telescope optical tube attaches to the mount via a dovetail slide bar mounting bracket. For the refractors and the Newtonian, the mounting bracket is the long bracket which is attached to the tube rings. For the Schmidt- Cassegrain the mounting bracket is attached along the bottom of the telescope tube. Before you attach the optical tube, make sure that the declination and right ascension clutch knobs (clamps) are tight. This will ensure that the mount does not move suddenly while attaching the telescope optical tube. To mount the telescope tube:

1.Remove the protective paper covering the optical tube. You will have to remove the tube rings on the refractors and Newtonian before removing the paper.

2.Loosen the mounting knob and the mounting safety screw on the side of the mount platform so they do not protrude into the mounting platform

3.Slide the dovetail mounting bracket into the recess on the top of the mounting platform (see figure 2-9).

4.Tighten the mounting knob on the Omni mounting platform to hold the telescope in place.

5.Hand tighten the mounting platform safety screw until the tip touches the side of the mounting bracket.

Tube Rings

Mounting Bracket

Mounting

Platform

Telescope

Mounting

Screw

Figure 2-9

Refractor Optical Tube is shown. The Newtonian and Schmidt-Cassegrain attach similarly.

NOTE: Never loosen any of the knobs on the telescope tube or mount other than the R.A. and DEC knobs.

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Contents Omni XLT Series Telescopes Table of Contents Astrophotography Page Omni XLT 102 Refractor Omni XLT 150 Newtonian Omni XLT 127 Schmidt-Cassegrain Setting up the Tripod Attaching the Equatorial Mount Installing the Counterweight Bar Attaching the Center Leg BraceInstalling the Counterweights Attaching the Slow Motion Control Knobs CablesAttaching the Telescope Tube to the Mount Installing the Finderscope Installing the Visual BackInstalling the Star Diagonal Installing the EyepiecesMoving the Telescope Manually Balancing the Mount in R.AAdjusting the Mount Balancing the Mount in DECAdjusting the Mount in Altitude Adjusting the Mount in AzimuthPage Page Focusing Image OrientationAligning the Finderscope Calculating MagnificationDetermining Field of View General Observing HintsCelestial Coordinate System Motion of the Stars Latitude Scale Pointing at PolarisFinding the North Celestial Pole Polar Alignment in the Southern Hemisphere Polar Alignment with the Latitude ScalePointing at Sigma Octantis Finding the South Celestial Pole SCPDeclination Drift Method of Polar Alignment Aligning the R.A. Setting Circle Using the R.A. Vernier Scale 11 Vernier ScaleObserving the Moon Lunar Observing HintsObserving the Planets Planetary Observing HintsObserving the Sun Solar Observing HintsObserving Deep Sky Objects Seeing ConditionsUsing the Lens Cap Aperture Stop with Refractor Telescopes SeeingPiggyback Photography Using Digital Cameras Eyepiece Projection for a Schmidt-Cassegrain FullLong Exposure Prime Focus Photography Planetary and Lunar Photography with Special Imagers CCD Imaging for Deep Sky Objects Terrestrial PhotographyMetering Reducing VibrationCare and Cleaning of the Optics Collimation of RefractorsCollimation of a Schmidt-Cassegrain Two 2 turnsCollimated telescope Should appear Symmetrical with Collimation of a Newtonian Aligning the Secondary MirrorBoth mirrors aligned with your eye looking into the focuser Night Time Star Collimating As a Series 1 # Page Page Appendix a Technical Specifications Appendix B Glossary of Terms Page Page Page Page Page Page Page Page Celestron Two Year Warranty
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