Celestron 82291 - Manuals - manualsarea.com

Page 2 - carefully so that it cannot be reached by; inexperienced adults; . Consider that a heavily; The incoming light; the light out of the tube and

2 Adjustment of Newtonian Telescopes with the Laser-Colli ™ by Baader Planetarium Caution: LASER ! Never ever look directly into a laser beam! Protect your eyes!!Store the Laser-Colli ™ carefully so that it cannot be reached by children or inexperienced adults . Consider that a heavily Miss-aligned ...

Page 3 - coma error; Thermal turbulences blur the image to a; To obtain best results from collimation; ) The main and the secondary mirrors must be centered in the tube.; What is the function of our Laser-Colli; is slid into

3 Loss of collimation is an important factor to be aware of with telescopes of any design if perform-ance ‘ falls off ’ at any time. A refractor ’ s eyepiece tilted within its eyepiece holder will show the same low quality blurred i m- ages. This holds true with all other mirror telescope systems li...

Page 4 - will be switched on by turning the

4 Of course, the Laser - Colli ™ functions reliably only if the laser beam it-self leaves its own hous-ing in an absolutely cen-tered position. Therefore the laser sourceis symmetrically adjust-able in the housing aroundits rotational axis, whichhas been carefully ad-justed on a mechanicallathe by u...

Page 5 - t see any reflected dot at the reference plate due to a moderate; Step-by-step procedure to collimate your Newtonian telescope; ° angle against the ocular holder,

5 On Left : Clear, translucent Reference plane with etched cross-marks Most laser collimating devices use a sim-ple opaque piece of plate glass to act asindicator for the returning laser beam. Many small suppliers just scratch theglass by using sand paper in order to geta cheap opaque reference plan...

Page 6 - Following pictures show the view from the tube; Picture 1 left; shows the laser beam

6 Read your telescope instruction manual for the correct procedure to remove the main mirror cell.Most manuals contain this in the maintenance part ” Cleaning The Main Mirror ” . Nearly all designs hold the main mirror cell in the tube by three screws. You will find them near the rear end of thetube...

Page 7 - Picture 2 below; The laser; Remember to switch off the Laser Colli; Details are shown in the sketch .

7 Picture 2 below shows first success: The laser ’ s light dot is correctly centered within the marker circle. Most telescope constructions adjust thesecondary mirror by three loaded screwslike those (allen head screws) shownhere in the picture.In other words: Turn one screw slowlyclockwise and the ...

Page 8 - If

8 In the lower sketch the left side screw is threaded into the mirror support plate and will pull thatside down, the right hand screw has it ’ s thread cut into the bottom plate and would lift the mirror up. The spring loaded mirror support is easier to manufacture and to work with. On the other han...

Page 9 - shows the coma error in a heavily misaligned; Picture right; shows a star image also highly enlarged after; Adjusting SC-Optics by means of a laser is not an easy task.

9 Having the reflected laser beam showing safely on the grid plane you can finish the collimationprocess quickly. Tilt the main mirror with the help of the adjustment screws until the laser beam passes through thehole (and is reflected into itself). That ’ s it! Your Newtonian is perfectly collimate...

Page 10 - WARNING; possibly; tion in the original instruction manual .

10 In the silver body Laser Colli(picture below) no sharp dotis produced by the reflectedlaser beam. The alignment procedure itself is exactly the same as for a Newton optics – only much simpler. Fasten the Laser-Colli ™ straight into the SC-visual back, without using a star diagonal, in order to av...

Page 11 - Changing batteries; s housing for changing the; s at it; B A A DER PL A NETA RIUM; A word of caution when collimating SC

11 Changing batteries Your Laser Colli TM has been adjusted with the greatest of care for lifelong service. It does not need to be removed from it ’ s housing for changing the batteries. Simply turn the buckle connecting the pendant on the back of thelaser counterclockwise approximately three turns ...