Manual Celestron CGEM II (page 28 of 161) (English, German, French, Italian, Spanish)

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28 | ENGLISH

Note: Once the worm gear is indexed, it will not need to

be positioned again until the telescope is turned off. To give

yourself more time to prepare for guiding, it may be necessary

to restart PEC recording after the worm gear has found its

index.

6. After 10 minutes, PEC will automatically stop recording.

7. Point the telescope at the object you want to image and

center the guide star on the illuminated cross hairs. You

are ready to play back the periodic error correction.

8. Once the drive’s periodic error has been recorded, use

the Playback function to begin playing back the correction

for future imaging guiding. If you want to re-record the

periodic error, select Record and repeat the recording

processes again. The previously recorded information

will be replaced with the current information. Repeat

steps 7 and 8 to playback the PEC corrections for your

next object.

Does the PEC function make unguided astroimaging

possible? Yes and no. For solar (ﬁltered), lunar and piggy-

back (up to 200 mm), the answer is yes. However, even

with PEC, autoguiding is still mandatory for long exposure,

deep sky astroimaging.

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Celestron CGEM II Manual

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