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Installing the Eyepiece
| The eyepieces go into the focuser. Make sure the two
thumbscrews are unscrewed enough that the do not protrude into the
barrel.
Slide the eyepiece into the barrel.
Tight both screws finger tight.
For non-zoom eyepieces, you do not need to overtighten the screws.
For zoom lenses that twist, the screws should be fairly tight to
prevent the eyepiece from turning when zooming in or out.
- If you can't get the screws tight, use one hand to hold the
bottom of the eyepiece and the other to zoom in or out.
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Installing an Eyepiece Filter
Filters, such as a moon filter, have male threads along their circumference.
Most eyepieces have female threading along their interior bottom. The
filter screws into the bottom of the eyepiece.
Note: that the threading is very fine. Do not force the filter.
Generally, if it won't screw in, it maybe misaligned. Unscrew it and try again.
The filter does not need to be "cranked" all the way down on the Celestron
Zoom lens (it's field lens prevents it from screwing all the way down).
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Eyepiece and filter separate |
Filter screwed onto eyepiece |
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| Note
the fine threading |
Note the gap between the eyepiece and the filter bezel. |
Moon Filter
Use a Moon Filter any time you are observing the moon, other than when it is
a thin crescent.
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