Celestron CPC 9.25 - Page 3

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Screw the visual back threaded ring onto the short threaded tube on the back of the telescope. The
threaded ring can be loosened (and then reghtened) at any me during your observing session if
you need to lt the star diagonal and eyepiece to a dierent angle for easier access.
Insert the eyepiece with the largest MM number on it, most likely 25mm. The bigger the mm
number the wider eld of view the eyepiece provides. Having a wide eld of view usually make it
much easier to nd and observe objects than narrow eld eyepieces, such as a 10mm.
Provided the telescope is not aiming anywhere towards the Sun, remove the dustcover from the
front lens.
Aligning the nderscope with the telescope
Make sure you never point the telescope or nderscope towards the sun at any me!
If the nderscope does not point to the same patch of sky as the main telescope it will be very
dicult to complete the 2-star alignment procedure (explained below). In essence, the nderscope
and main telescope would be “cross-eyed”, and aim in dierent direcon.
There are three alignment screws (one is a nylon bolt) on the rear of the nderscope. By screwing
these screws in/out you can move where the crosshairs in the nderscope point. You need to
unscrew one side in order to be able to screw an opposite screw inwards.
Unscrew the declinaon knob and the right ascension knob. Point the main telescope at a disncve
object, such as a power pole, about 100m or more away. Center a disncve point such as an
insulator on the pole top (example A below). Tighten both knobs again to stop the telescope from
moving.
Now look through the nderscope. It may not be poinng exactly at the insulator on the pole
(example B below). But you need to make it do so. Use the three adjustment screws on the rear of
the nderscope to place the crosshairs over the same insulator (example C below) centered in the
main telescope view.