Extend tripod legs 6 to 8 inches byloosening the tripod leg locking knob and pulling the leg to desired length andre-tightening knob.

Assemble tripod by spreading the legsout until the center leg brace is fullyextended.

Quick Set-up Guide

1 2 3

All three legs should be the same length toprovide a level platform for the telescope. Abubble level is included (inset) to assist in leveling.

4

7

Hold the telescope fork arm and placethe bottom of the base inside the tripodmounting platform as shown.

Place accessory tray on top of center legbrace by lining up the grooves on thetray to the post on the brace.

5

Once grooves are aligned, turn accessorytray until it snaps into clips on each legbrace.

6

Thread the coupling screw into the hole at the bottom of the fork armbase. Tighten screw to secure the fork arm.

8

Slide the optical tube dovetail into the forkarm as shown above.

9

NexStar 90 & 127SLT

Your NexStar includes: optical tube; fork arm;pre-assembled tripod; computerized handcontrol; hand control holder; star diagonal;two eyepieces; finderscope; accessory tray;documentation including an owner’smanual, The Sky® CD and NSOL TelescopeControl Software.

Item #22087

Coupling screw

Item #22097

Quick Set-up Guide [cont]

Secure optical tube to fork arm bytightening the screw located on theinside of the fork arm assembly.

11

To attach the finderscope, loosen the silverscrew and slide finderscope into mountingplatform .

12

Secure finderscope to mounting platform bytightening the silver screw. The glass window ofthe finderscope should be facing towards thefront of the telescope.

13

Insert the chrome barrel of the stardiagonal into the focuser and tighten thetwo silver screws to secure in place.

14

Select the low power (25mm) eyepieceand insert it as shown above. Tightensilver screw to secure.

15

Attach plastic hand control holder to thetripod leg.

16

Slide Computerized Hand Control intothe hand control holder as shown above.

17 18

Before you begin viewing, pleaseremember to remove tube lens cap.

19

While observing, tube should bepositioned as shown above.

10

Plug Computerized Hand Control intothe “Hand Control” port on the fork arm.

Before you can begin observing, you must setup your handcontrol, align your finderscope and align your telescope. Step

by step instructions are included in the following Hand ControlSetup section.

20

Before you can use your telescope, youmust insert 8 AA batteries.

21

Place AA batteries inside the batterycompartment located at the base of thefork arm.

Hand Control Guide

1

Turn power switch (located on the side ofthe fork arm) to “on”position. The light willcome on and the hand control willdisplay “NexStar SLT”.

2

You will notice that there are directionalarrows in the center of the hand control.These only move the telescope. Theycannot be used to scroll through menu features.

3

Now you will need to align the finderscope.Turn on the red LED light by turning theknob shown above. When used for the firsttime, remove the clear plastic disk that islocated between the battery clip and thebattery. See inset.

4

Use the hand control direction arrowbuttons to point telescope at a distantland object, like a telephone pole or atnight you can use the moon. Center andfocus the object in the 25mm eyepieceof the telescope.

5

In order to accurately center an object in the eyepiece it may be necessary tochange the slew speed of the motors. To change the slew speed, press theRATE button then select a number from 1 (slowest) to 9 (fastest).

Before you can begin using your NexStar SLT, you must setup your computerized hand control and go through theSkyAlign alignment procedure. In order for the NexStar to accurately point to the objects in the sky, it must first bealigned with known positions (stars) in the sky. With this information, the telescope can create a model of the sky,which it uses to locate any object in its database

Once you have aligned your finderscope,make sure to turn off the LED light toconserve the battery. Now you are readyto align the telescope. This will have tobe done at night.

7 9

Use the UP and DOWN scroll buttons(located on #6 and #9) to select“SkyAlign” then press ENTER. Now youwill need to enter your site/timeinformation.

With the object centered in the eyepiece,use the azimuth (right/left) and altitude(up/down) adjustment knobs on thefinderscope to place the red alignment dot directly over the centered object.

10

The hand control will display the lastentered time and site information. Sincethis is your first time using the NexStar,press UNDO to enter your site and timeinformation.

11 12

Using the numeric key pad enter yourtime information. Press ENTER tocontinue. Press UNDO to backspace.

Press ENTER to select City Database. Usethe Up and Down scroll buttons (locatedon #6 and #9) and choose the closest cityto your present location. Press ENTERafter selecting the country, state and city.

8

When the display reads NexStar SLT,press ENTER to begin the alignmentprocedure.

6

Hand Control Guide [cont]

If you have questions or problems with set-up, please contactCelestron Technical Support: 310.803.5955

16

If the finderscope has been properlyaligned, the alignment star should nowbe visible in the field of view of theeyepiece.

17

The hand control will prompt you tocenter the bright alignment star in thecenter of the eyepiece. Once centered,press ALIGN. This will accept the star asyour first alignment position.

18

19

Repeat the process for the thirdalignment star. When the telescope hasbeen aligned to the final star, the displaywill read “Match Confirmed”. Press UNDOto display the names of the three brightobjects you aligned to, or press ENTER toaccept these three objects for alignment.

20

Now that your telescope is properlyaligned, you are ready to find your firstobject. Press the TOUR button on thehand control. The hand control willdisplay a list of objects that are visible forthe date and location entered.

For the second alignment object, choosea bright star or planet as far from the firstalignment object as possible. Once againuse the directional arrow buttons tocenter the object in the finderscope andpress ENTER. Once object is centered inthe eyepiece, press ALIGN.

15

Use the directional arrow keys on the handcontrol to slew (move) the telescopetowards any bright celestial object in thesky. Center the object in the finderscopeand press ENTER.

13

Now, using the Up and Down scrollbuttons (located on #6 and #9), verify thetime zone you are in and press ENTER.

14

Using the numeric key pad enter thedate. Press ENTER to continue. PressUNDO to backspace.

21

Press INFO to read information about theobject displayed. Press the DOWN scrollkey to display the next object. PressENTER to slew (move) to the displayedobject.

For general usage information, please consult your user’s manual.

TOUR INFO