Celestron 82291 instruction manual Changing batteries

A word of caution when collimating SC’s and other Catadioptric OTA’s:

In any Newtonian telescope it is a commonly accepted procedure, to mark the center of the primary mirror with a

small“Thecircle,“ mostbeforeimportantattemptingactioncollinmationorder. to ensure control over the process of collimation (Aristotle’s: “Give me a

It is’s path“). fixed point in space and I will unlatch the earth from it

In terms of an SC-optical system, this would mean to mark the very center of the convex secondary (!) mirror, so as

to ensure the laser beam stays within the rotational center of the optical system’s are. made so sloppy that the precond

The downside is that most visual back accessories in present day SC-OTAi-

tion mentioned above will–nota sufficientlybe met. sharp and well adjusted laser beam with a precision chrome sleeve, you must Even with the best tools

ensure that the laser will hit the SC-secondary dead center, so that ’thes centerreflected. beam will truly indicate the offset of the secondary adjustment,“ring“-markratherontothanathsecondaryoffset fromis nottheasecondarydifficult task, when the SC-OTA has a provision to quickly

Putting a tiny center– such as it is the case with CELESTRON’S FaStar-Optics. un-mount the secondary mirror

The procedure is essentially the same, as described earlier for the center mark on a Newtonian primary.

starescope.

– if you do not feel happy with marking the secondary mirror of your telescope, please stick with the “real In any“ collimationcase techniques as described in the manual of your Schmidt-Cassegrain tel

We cannot take any responsibility for damaged optics sets due to careless or otherwise wrong optical handling.

Changing batteries

Your Laser ColliTM has been adjusted with the greate’s houstingof forcarechangingfor lifelongthe service. It does not need to be removed from it

batteries. Simply turn the buckle connecting the pendant on the back of the laser counterclockwise approximately three turns to open the battery com- partment. This procedure will not alter the laser adjustment!

Replace worn-out batteries with three round “hearing aid“ batteries 1.4 Volt (such as VARTA V675 or Panasonic PR 675 H)

Do not attempt to loosen the headless set-screws, which center the laser within the metal body of the Laser ColliTM. Most likely you will not be able to recover precise adjustment without extensive auxiliary equipment. The set screws are marked with an indicator to show whenever any of the six screws was reoriented by the user.

Please understand that precise adjustment is about the most time consuming work during the pro-

duction of the Laser ColliTM. Factory realignment is ’sexpensivat it’s bestandalreadyinvolves. two times freight charges. So better not to tamper with the adjustment, it

Note:

The diameter of the exiting laser beam almost matches the diameter of the small hole in the reference glass.

For this reason it is possible that the beam slightly lights up on the rim of the center hole.

This hasLaserno negative-Colli™.effect whatsoever on precision or functionality of our

BAADER PLANETARIUM

Zur Sternwarte • 82291 Mammendorf • Tel.08145/8802 • Fax 08145/880511

www.baader_planetarium.de • service@baader-planetarium.de • www.celestron.de

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