background image

NOTE: The image in the telescope will appear rotated
180° (upside down and reversed left-to-right). This is nor-
mal for astronomical reflector telescopes. The finder
scope view will also be rotated 180° (see Figure 5).

If you have trouble focusing, rotate the focusing knob so the
drawtube is in as far as it will go. Now look through the eyepiece
while slowly rotating the focusing knob in the opposite direc-
tion. You should soon see the point at which focus is reached.

The metal thumb screw on the top of the body of the focuser will
lock the focuser drawtube in place once the telescope is proper-
ly focused. Before focusing, remember to first loosen this thumb
screw. Do not loosen the thumbscrew too much as there must
be some tension to keep the drawtube securely in the focuser.

Viewing with Eyeglasses

If you wear eyeglasses, you may able to keep them on while
you observe, if the eyepiece has enough “eye relief” to allow
you to see the whole field of view. You can try this by looking
through the eyepiece first with your glasses on, and then with
them off, and see if the glasses restrict the view to only a por-
tion of the full field. If they do, you can easily observe with
your glasses off by just re-focusing the telescope the needed
amount. If you suffer from severe astigmatism, however, you
may find images noticeably sharper with your glasses on.

Aligning the Finder Scope

The SkyView Pro 6LT EQ Deluxe comes with a 6x30 achro-
matic finder scope (Figure 3a). The number 6 means six-
times magnification and the 30 indicates a 30mm diameter
front lens. The finder scope makes it easier to locate the
object you want to observe in the telescope, because the find-
er scope has a much wider field of view.

The SkyView Pro 6LT EQ’s finder scope uses a spring-loaded
bracket that makes alignment of the finderscope very easy. As
you turn either of the thumbscrews, the spring in the bracket’s
tensioner moves in and out to keep the finder scope secure in
the bracket.

The finder scope must be aligned accurately with the tele-
scope for proper use. To align it, first aim the main telescope

at an object at least a 1/4 mile away—the top of a telephone
pole, a chimney, etc. First, loosen the R.A. and Dec. lock
levers and move it until the telescope is pointing towards the
desired object. Then sight along the tube to aim the tele-
scope. Turn the focus knob until 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 scope bracket’s alignment thumb-
screws will be needed until the object comes into the finder
scope’s field of view.

With the image in the finder scope’s field of view, you now
need to fine-adjust the alignment thumbscrews to center the
object on the intersection of the crosshairs. Adjust the aim of
the finder scope by turning the thumbscrews, one at a time,
until the object is centered.

The finder scope alignment needs to be checked before every
observing session. This can easily be done at night, before
viewing through the telescope. Choose any bright star or
planet, center the object in telescope eyepiece, and then
adjust the finder scope bracket’s alignment thumbscrews until
the star or planet is centered on the finder’s crosshairs.

Focusing the finder scope

If, when you look through the finder scope, the images appear
somewhat out of focus, you will need to refocus the finder
scope for your eyes. Loosen the lock ring located behind the
objective lens cell on the body of the finder scope (see Figure
3a). Back the lock ring off by a few turns, for now. Refocus the
finder scope on a distant object by threading the objective
lens cell in or out of the finderscope body. Precise focusing
will be achieved by focusing the finder scope on a bright star.
Once the image appears sharp, retighten the locking ring
behind the objective lens cell. The finder scope’s focus should
not need to be adjusted again.

Magnification & Eyepieces

Magnification, or power, is determined by the focal length of
the telescope and the focal length of the eyepiece. Therefore,
by using eyepieces of different focal lengths, the resultant
magnification can be varied.

Magnification is calculated as follows:

Telescope Focal Length

= Magnification

Eyepiece Focal Length

The SkyView Pro 6LT EQ has a focal length of 1200mm,
which when used with the supplied 25mm eyepiece yields:

1200mm

= 48x

25mm

The magnification provided by the 10mm eyepiece is:

1200mm

= 120x

10mm

6

Naked-eye view

Figure 5. 

The view through a standard finder scope and reflector

telescope is rotated 180°. This is true for the SkyView Pro 6LT EQ
and its finder scope as well.

View through finder scope and telescope

Содержание SKYVIEW PRO 6LT EQ 9872

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 19: ...19 ...

Страница 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...

Отзывы: