ORION TELESCOPES & BINOCULARS SKYVIEW PRO 6LT EQ 9872, Instruction Manual

Page 1: ...oviding Exceptional Consumer Optical Products Since 1975 Customer Support 800 676 1343 E mail support telescope com Corporate Offices 831 763 7000 P O Box 1815 Santa Cruz CA 95061 Orion SkyView Pro 6LT EQ 9872 Equatorial Reflecting Telescope ...

Page 2: ...bscrew Mounting plate securing knob Counterweight shaft Counterweight lock knobs Counterweights Finder scope Finder scope bracket Eyepiece Focus knob Optical tube Tube rings Tube ring mounting plate Mirror cell Right ascension slow motion knob Latitude scale Latitude adjustment L bolts Center support shaft Tripod support tray Tripod leg Leg lock knobs ...

Page 3: ...sembling the telescope for the first time should take about 30 minutes No tools are needed other than the ones provid ed All screws should be tightened securely but be careful not to over tighten or the threads may strip Refer to Figure 1 dur ing the assembly process During assembly and anytime for that matter do not touch the surfaces of the telescope mirrors or lenses of the finder scope or eyep...

Page 4: ...aft and slide both counter weights onto the shaft Make sure the counterweight lock knobs are adequately loosened to allow the counterweight shaft to pass through the holes in the counterweight Position the counterweights about halfway up the shaft and tighten the lock knobs Replace the toe saver at the end of the bar The toe saver prevents the counterweights from falling on your foot if the lock k...

Page 5: ...tly counterbalance the telescope Figure 4a That s the point at which the shaft remains horizontal even when you let go with both hands Figure 4b 3 Retighten the counterweight lock knobs The telescope is now balanced on the right ascension axis 4 To balance the telescope on the declination axis first tight en the R A lock lever with the counterweight shaft still in the horizontal position 5 With on...

Page 6: ...l the object is properly focused Make sure to position the object in the center of the telescope s eyepiece by turning the R A and declination slow motion control knobs the R A and Dec lock levers must be tightened to use the slow motion control knobs Now look in the finder scope Is the object visible Ideally it will be somewhere in the field of view If not some coarse adjustment to the finder sco...

Page 7: ...that the stars appear to move slowly from east to west over time That apparent motion is caused by the Earth s rotation from west to east An equatorial mount Figure 6 is designed to compensate for that motion allowing you to easi ly track the movement of astronomical objects thereby keeping them from drifting out of your telescope s field of view while you re observing This is accomplished by slow...

Page 8: ...t is recommended for astro photography For this we suggest using the optional polar axis finder scope From this point on in your observing session you should not make any further adjustments to the latitude of the mount nor should you move the tripod Doing so will undo the polar alignment The telescope should be moved only about its R A and Dec axes Polar Alignment Using an Optional Polar Axis Fin...

Page 9: ...e constellations depicted match their current ori entation in they sky when viewed with the naked eye To do this release the R A lock lever and rotate the main tel escope around the R A axis until the reticle is oriented with sky For larger optical tubes you may need to remove the tube from the mount to prevent it from bumping into the mount Once the reticle is correctly oriented use the right asc...

Page 10: ...er set of numbers apply to viewing in the Northern Hemisphere while the numbers above them apply to viewing in the Southern Hemisphere The Dec setting circle is scaled in degrees with each mark representing 2 increments Values of declination coordinates range from 90 to 90 The 0 mark indicates the celestial equator When the telescope is pointed north of the celestial equator values of the declinat...

Page 11: ...he horizon than Polaris You can t do it with the counterweights down as pictured in Figure 1 Again you have to rotate the scope in right ascension so that the counterweight shaft is positioned horizontally Then rotate the scope in declination so it points to where you want it near the horizon To point the telescope directly south the counterweight shaft should again be horizontal Then you simply r...

Page 12: ... reflections for the time being The secondary mirror itself should be cen tered in the focuser drawtube in the direction parallel to the 12 Figure 14 To center the secondary mirror under the focuser hold the secondary mirror holder in place with one hand while adjusting the center bolt with a Phillips screwdriver Do not touch the mirror s surface This adjustment will rarely need to be done Figure ...

Page 13: ...r is off center You will fix that in the next step Adjusting the Primary Mirror The final adjustment is made to the primary mirror It will need adjustment if as in Figure 13d the secondary mirror is cen tered under the focuser and the reflection of the primary mir ror is centered in the secondary mirror but the small reflec tion of the secondary mirror with the dot of the collimation cap is off ce...

Page 14: ...rs appear to twinkle the atmosphere is significantly distorting the incoming light and views at high magnifications will not appear sharp If the stars appear steady and do not twinkle seeing conditions are probably good and higher magnifica tions will be possible Also seeing conditions are typically poor during the day This is because the heat from the Sun warms the air and causes turbulence Good ...

Page 15: ...ase for all deep sky objects however Many galaxies are quite small yet are somewhat bright so higher power may show more detail The best rule of thumb with eyepiece selection is to start with a low power wide field and then work your way up in magni fication If the object looks better try an even higher magnifi cation If the object looks worse then back off the magnifica tion a little by using a l...

Page 16: ...k skies you can observe a wealth of fascinating deep sky objects including gaseous nebulas open and glob ular star clusters and a variety of different types of galaxies Most deep sky objects are very faint so it is important that you find an observing site well away from light pollution Take plenty of time to let your eyes adjust to the darkness Do not expect these subjects to appear like the phot...

Page 17: ...emoved using this method Use caution rubbing too hard may scratch the lens On larger lenses clean only a small area at a time using a fresh lens tissue on each area Never reuse tissues Cleaning Mirrors You should not have to clean the telescope s mirrors very often normally once every year or so Covering the telescope with the dust cover when it is not in use will prevent dust from accumulating on...

Page 18: ...Sirius Plössls fully coated 1 25 Magnification 48x with 25mm and 120x with 10mm Finder Scope 6x30 achromatic 7 field of view Focuser Rack and pinion accepts 1 25 eyepieces Mount SkyView Pro German equatorial Tripod Steel Tripod support tray Aluminum provides additional stability holds five 1 25 eyepiece and two 2 eyepieces Weight 55 lbs Mount 41 lbs optical tube 14 lbs Polar axis latitude adjustme...

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Page 20: ...ay Watsonville CA 95076 If the product is not registered proof of purchase such as a copy of the original invoice is required This warranty does not apply if in Orion s judgment the instrument has been abused mishan dled or modified nor does it apply to normal wear and tear This warranty gives you specific legal rights and you may also have other rights which vary from state to state For further w...