Celestron 8i manual Powering the NexStar, Hand Control, Star Diagonal

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Powering the NexStar

The NexStar can be powered by eight user supplied AA batteries or with an optional AC adapter or cigarette lighter adapter. The battery compartment is located in the center of the telescope's base (see figure 1-3).

To power the NexStar with batteries:

1.Slowly rotate the optical tube upwards so that you have easy access to the battery compartment.

2.Remove the battery cover from the center of the base by gently lifting up on the round portion of the cover.

3.Insert the batteries into the battery compartment of the base.

4.Reattach the battery compartment door by gently pushing down on the cover until it snaps into place.

5.Turn on the power to the NexStar by flipping the switch, located at the bottom portion of the fork arm, to the "On" position.

The Hand Control

Battery Compartment

Figure 1-3: The NexStar can be powered

with 8 AA batteries.

The hand control is located on the side of the fork arm and can be removed and used remotely or used while attached to the fork. The hand control attaches to the fork arm by resting on two posts, located on the bottom of the hand control cradle, and a clip inside the fork arm. To remove the hand control from the fork arm cradle, gently lift the hand control upwards and pull out. To return the hand control into the fork arm, lower the hand control into the cradle so that the opening in the back of the hand control slides over the clip inside the fork arm.

 

Once the telescope is powered up, use the hand control to move the optical tube to the horizontal position, this

NOTE

will make it more convenient to attach the necessary accessories as well as remove the front lens cover.

In case of a loss of power, the optical tube can be moved by hand. However, when powered on, the telescope should always be controlled via the hand control.

The Star Diagonal

The star diagonal diverts the light at a right angle from the light path of the telescope. For astronomical observing, this allows you to observe in positions that are more comfortable than if you were to look straight through. To attach the star diagonal:

1.Turn the thumbscrew on the visual back until its tip no longer extends into (i.e., obstructs) the inner diameter of the visual back.

2.Slide the chrome portion of the star diagonal into the visual back.

3.Tighten the thumbscrew on the visual back to hold the star diagonal in place.

If you wish to change the orientation of the star diagonal, loosen the thumbscrew on the visual back until the star diagonal rotates freely. Rotate the diagonal to the desired position and tighten the thumbscrew.

StarPointer

Finderscope Eyepiece

Star

Diagonal

Visual Back

Figure 1-4 - The Visual Accessories

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Contents Page Hand Control Operation Alignment Procedures Care and Cleaning of the Optics Collimation Page NexStar 8i SE StarPointer Finderscope Eyepiece Diagonal Visual Back Appendix C Longitude Latitude Mounting the Telescope to the Tripod Assembling the NexStarPowering the NexStar Hand ControlStar Diagonal Star Pointer Installation EyepieceStar Pointer Finderscope Star Pointer Operation NexStar Computerized Hand Control Double Stars Hand Control OperationAuto Two-Star Align Alignment ProceduresTwo Star Alignment EQ North / EQ South Alignment Object CatalogNexStar Re-Alignment Selecting an ObjectTour Mode Finding PlanetsSlewing to an Object Setup Procedures Direction ButtonsRate Button Page Menu Scope Setup FeaturesUtility Features Helpful Hint NexStar Ready Image Orientation Focusing Calculating MagnificationDetermining Field of View General Observing Hints Celestial Coordinate System Motion of the Stars Wedge Align Polar Alignment with optional WedgeFinding the North Celestial Pole Observing the Planets Observing the MoonObserving the Sun Lunar Observing HintsSeeing Conditions Observing Deep Sky ObjectsTransparency Sky IlluminationPage Short Exposure Prime Focus Photography Full Eyepiece ProjectionPlanet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus PhotographyPage CCD Imaging Terrestrial PhotographyMetering Reducing VibrationCollimation Care and Cleaning of the OpticsCollimated telescope Should appear Symmetrical with Page Adapter, Car Battery #18769 Page Page Appendix a Technical Specifications Page Appendix B Glossary of Terms Trillion km 5.87 X 1 trillion mi Right Ascension RA Appendix C Longitudes Latitudes Georgia Minnesota Rhode Island Canada Communication Protocol Appendix D RS-232 ConnectionAppendix E Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty

8i specifications

The Celestron 8i is a highly regarded telescope that has made a significant impact in the world of amateur astronomy, renowned for its performance, advanced features, and user-friendly design. Part of Celestron's Advanced Series, the 8i model boasts an impressive 8-inch Schmidt-Cassegrain optical system, which combines the advantages of a large aperture with a compact design. This allows enthusiasts to explore celestial objects with greater clarity, providing bright, sharp images of planets, star clusters, and nebulae.

One of the standout features of the Celestron 8i is its Fast Star capability, which allows for rapid imaging of celestial objects. Coupled with its advanced StarBright XLT coatings, this system enhances light transmission and increases contrast, resulting in a more vivid and detailed observation experience. This combination makes it an ideal choice for both novice and experienced astronomers who seek high-quality visuals of deep-sky objects.

The telescope's computer-controlled GoTo mount simplifies the process of locating and tracking celestial objects. With the push of a button, users can easily access a database containing over 40,000 astronomical objects, allowing for an effortless stargazing experience. The Celestron 8i also features an intuitive hand controller that enables users to customize their observations and seamlessly navigate the night sky.

The Celestron 8i is designed for portability, despite its robust optical performance. Weighing in at around 45 pounds, it is relatively easy to transport to different observing locations. The telescope's sturdy construction ensures stability while providing ease of setup, facilitating a hassle-free stargazing experience.

In terms of accessories, the 8i comes equipped with a 25mm eyepiece, offering a moderate magnification that is perfect for a variety of targets. Additionally, users can expand their observing capabilities with optional eyepieces, filters, and focal reducers, catering to both visual and astrophotography pursuits.

Overall, the Celestron 8i stands out as a versatile and powerful telescope that meets the needs of amateur astronomers at various skill levels. With its advanced features, superior optics, and impressive usability, the 8i offers a unique and rewarding experience under the night sky. Whether for planetary observation or deep-sky exploration, the Celestron 8i remains a top choice for astronomy enthusiasts.
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