Celestron OMNI XLT 102 manual Adjusting the Mount in Altitude, Adjusting the Mount in Azimuth

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Adjusting the Mount in Altitude

To increase the latitude of the polar axis, tighten the rear latitude adjustment screw and loosen the front screw (if necessary).

To decrease the latitude of the polar axis, tighten the front (under the counterweight bar) latitude adjustment screw and loosen the rear screw (if necessary).

The latitude adjustment on the Omni mount has a range from approximately 20° to 60°.

It is best to always make final adjustments in altitude by moving the mount against gravity (i.e. using the rear latitude adjustment screw to raise the mount). To do this you should loosen both latitude adjustment screws and manually push the front of the mount down as far as it will go. Then tighten the rear adjustment screw to raise the mount to the desired latitude.

Front Latitude

Adjustment Screw

Rear Latitude Adjustment

Screw

Azimuth

Adjustment Screw

Figure 2-16

Adjusting the Mount in Azimuth

For rough adjustments in azimuth, simply pick up the telescope and tripod and move it. For fine adjustments in azimuth:

Turn the azimuth adjustment knobs located on either side of the azimuth housing (see Fig 2-16). 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 adjusting the mount is done during the polar alignment process only. Once polar aligned, the mount must NOT be moved. Pointing the telescope is done by moving the mount in right ascension and declination, as described earlier in this manual.

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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 Attaching the Center Leg Brace Installing the Counterweight BarAttaching the Slow Motion Control Knobs Cables Installing the CounterweightsAttaching the Telescope Tube to the Mount Installing the Visual Back Installing the FinderscopeInstalling the Eyepieces Installing the Star DiagonalBalancing the Mount in R.A Moving the Telescope ManuallyBalancing the Mount in DEC Adjusting the MountAdjusting the Mount in Azimuth Adjusting the Mount in AltitudePage Page Image Orientation FocusingCalculating Magnification Aligning the FinderscopeGeneral Observing Hints Determining Field of ViewCelestial Coordinate System Motion of the Stars Pointing at Polaris Latitude ScaleFinding the North Celestial Pole Polar Alignment with the Latitude Scale Polar Alignment in the Southern HemisphereFinding the South Celestial Pole SCP Pointing at Sigma OctantisDeclination Drift Method of Polar Alignment Aligning the R.A. Setting Circle 11 Vernier Scale Using the R.A. Vernier ScaleLunar Observing Hints Observing the MoonObserving the Planets Planetary Observing HintsSolar Observing Hints Observing the SunObserving Deep Sky Objects Seeing ConditionsSeeing Using the Lens Cap Aperture Stop with Refractor TelescopesPiggyback Photography Using Digital Cameras Full Eyepiece Projection for a Schmidt-CassegrainLong Exposure Prime Focus Photography Planetary and Lunar Photography with Special Imagers Terrestrial Photography CCD Imaging for Deep Sky ObjectsMetering Reducing VibrationCollimation of Refractors Care and Cleaning of the OpticsTwo 2 turns Collimation of a Schmidt-CassegrainCollimated telescope Should appear Symmetrical with Aligning the Secondary Mirror Collimation of a NewtonianBoth 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