Celestron 82291 manual

A dj ustment (Collimat ion) of Ne w t on ian- and SC-T elescopes with the help o f the LA SE R-COLLI TM by Baader P lanet arium Instruction Manual  2005 by Baade r Planetariu m Gmb H B A A DER PL A NETA RIUM Zu r St er n w ar t e • 82291 Mam m en d o r f • Tel .08145/88 02 • Fax 0814 5/880 5 w w w .b aad er _p l an et ar i um .de • s er [...]

2 Adjustm ent of N ewtonian Telesc opes wit h th e Laser-C olli ™ by Baader Pl anet arium Caution: LA SE R ! Never ever look directly i n to a las e r beam ! Prot ect your eyes ! ! Store the Laser-Colli ™ care f ully so th at it c annot be reac hed by children or inexperien ced adults . Consider that a heavily M iss-aligned telesc ope will de f[...]

3 Loss of collimati on is an important fa ctor t o b e aware of with te lesco p es of any design if per f o rm- anc e ‘ fa lls off ’ at any time. A r efractor ’ s eyepiece t ilt e d within its e yepiec e hold e r will show t he s ame low quality bl urred i m- ages. This holds t ru e with all o ther mirr or te l e scope syst ems like the popul[...]

4 Of course , the Laser - Colli ™ f unctions relia bly only i f the l aser beam it- self leaves its own hous- ing in an a bsolutely cen- tered position. Therefore the laser s ource is symm etrically adjus t- able in the housing around its rotational axis, w hich has been car efu lly ad- justed on a mech anical lathe b y u s prior to ship- ping - [...]

5 On Left : Clear, transl ucent Referenc e plane with etched cros s-marks M ost lase r colli mating devices us e a sim- ple opaque piece of plate glass to act as indicator for the r etu r n ing laser b eam. M any sma ll suppliers j u st scratc h the glass by using sand p aper in order t o get a cheap opaque re fe rence pla ne. Our Clear Refere nce [...]

6 Read your telescope ins truction man ual f or the correct p r o cedur e to remove the mai n mirror cell. M ost manuals contain this i n the maintena nce part ” Cleanin g The Main Mir ror ” . Nearly all designs hold the m a in mirror cell in the t ube by t hree screws. Yo u will find them near the r ear e nd of t h e tube s pread 120 ° apa rt[...]

7 Pic tur e 2 below s hows first success: The l a ser ’ s light dot is correctly centere d within the marker ci rcle. M ost t elescope constr uctions a djust the secondary mirror by th re e lo aded screws like those (a lle n hea d scr e ws) shown here in the picture. In o ther wor d s: Turn o ne screw slowly clockwise and t h e secondary mirror i[...]

8 In th e lower s ket c h t he left sid e screw is t h readed into the mi rror support plate and wil l pull th at side d own, the right hand scr ew has it ’ s thread cut into t he bottom pla te and would li f t t he mirror up. The spring loaded mirror support is easier to ma nufacture and to work wit h. On the other hand the resilience of the spr[...]

9 Having the re flected las er beam s ho wi n g sa f ely on the grid plan e you can f inis h the collimation process quickly. Tilt the main mir ror with the help o f the adjustment screws until the l aser b eam passes through t he hole (and is re f lected into itsel f ). That ’ s it! Your Newton i an is perfectly collimat ed. A final check of the[...]

10 In the silver body L ase r C o lli (picture below) no s harp dot is produced by th e reflected laser beam. The alignment pr ocedure itself is exact ly the same as for a Newton optics – only much simpler. Fasten the Laser-Col li ™ straight i nto the SC-visual ba ck, without usin g a star diag onal, in order to avoid wrong alignm ent due to in[...]

11 Changing batteri es Your L aser Colli T M has been adjuste d with the greatest of care f or lifelong service. I t do es not nee d to b e remov e d from it ’ s housing f or changin g the batteries. S imply turn the buckle connecting the pendant on the back of the laser cou nte rcl o ckwise approxima tely three turns to open the battery com- par[...]