Celestron Celestar 8, Инструкция по эксплуатации

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Celestar Manual
Astronomy Basics 34
2. Loosen the DEC clamp and move the telescope so that the tube is parallel to the polar axis. When this
is done, the declination setting circle will in90°. If the declination setting circle is not aligned,
move the telescope so that the tube is parallel to the polar axis (see figure 4-6).
3. Adjust the mount in altitude and/or azimuth until Polaris is in the field of view of the finder.
4. Center Polaris in the field of the telescope using the altitude and azimuth adjustment knobs.
Remember, while polar aligning, do NOT move the telescope in R.A. or DEC. You do not
want to move the telescope itself, but the polar axis. The telescope is used simply to see
where the polar axis is pointing. You adjust the telescope by moving the wedge and/or
tripod.
Once Polaris is in the finder it should also be centered in the telescope. This, of course, presumes you
aligned the finderscope with the main optical tube. If not, use the fine adjustment controls to center Polaris
in the telescope field.
Figure 4-6
This is how the telescope is to be set up for polar alignment. The tube should be parallel to the forks
and the mount should point to Polaris.
Declination Drift Method of Polar Alignment
This method of polar alignment allows you to get the most accurate alignment on the celestial pole and is
required if you want to do long exposure deep-sky astrophotography through the telescope. The
declination drift method requires that you monitor the drift of selected stars. The drift of each star tells you
how far away the polar axis is pointing from the true celestial pole and in what direction. Although
declination drift is simple and straight-forward, it requires a great deal of time and patience to complete
when first attempted. The declination drift method should be done after any one of the previously
mentioned methods has been completed.