Celestron NEXSTAR 4 Manuel d'instructions Page 1

INSTRUCTION MANUAL

The NexStar 4 has a removable hand controller built into the side of the fork arm designed to give you instant access to all the functions the Ne

4. Catalog Keys: The NexStar has a key on the hand control to allow direct access to each of the catalogs in its 40,000 object database. The NexSta

telescope. Finally, EQ North and EQ South alignments are designed to assist you in aligning the NexStar when polar aligned using the tripods built-

5. If the finderscope has been properly aligned with the telescope tube, the alignment star should now be visible inside the field of view of the eye

• Press the UNDO button to display the next most suitable star for alignment. • Use the UP and DOWN scroll buttons to manually select any star you w

Never look directly at the sun with the naked eye or with a telescope (unless you have the proper solar filter). Permanent and irreversible eye damag

7. The telescope then asks you to center in the eyepiece the alignment object you selected. Use the direction arrow buttons to slew the telescope to

Sync: The Sync feature can be used to improve pointing accuracy in a specific region of the sky. Sync is a very useful feature especially when used

Slewing to an Object Once the desired object is displayed on the hand control screen, you have two options: • Press the INFO Key. This will give y

DDiirreeccttiioonn BBuuttttoonnss The NexStar has four direction buttons in the center of the hand control which control the telescope motion in al

INTRODUCTION...

This rate compensates for the rotation of the earth by moving the telescope at the same rate as the rotation of the earth, but in the opposite directi

For a description of how to attach a camera body to you NexStar mount, see Astronomy Basics section. To locate a firing cable for your model of cam

Exposure Delay- Allows you to set a time delay between each exposure. Sequence End - The Sequence End option lets you select whether the imaging se

necessary for photographic guiding. Positive backlash compensation is applied when the mount changes its direction of movement from backwards to forwa

UUttiilliittyy FFeeaattuurreess Scrolling through the MENU options will also provide access to several advanced utility functions such as anti-back

Set Mount Position The Set Mount Position menu can be used to recover an alignment in cases where the telescope or tripod has been manually moved. F

ALT-AZEQ NORTHEQ SOUTHOFFMODESIDEREALSOLARLUNARRATETRACKINGVIEW TIME-SITESETUP TIME-SITEANTI-BACKLASHSLEW LIMITSFILTER LIMITSDIRECTION BUTTONSGOTO APP

A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is focused. Some telescopes

Figure 5-3 The emblem on the end of the focus knob shows the correct rotational direction for focusing the NexStar. FFooccuussiinngg The NexStar

GGeenneerraall OObbsseerrvviinngg HHiinnttss• k across or over objects that are producing heat waves. This includes asphalt parking lots on hot sum

Cordwrap...

Up to this point, this manual covered the assembly and basic operation of your NexStar telescope. However, to understand your telescope more thorou

MMoottiioonn ooff tthhee SSttaarrss The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily trek is

Figure 6-3 This is how the telescope is to be set up for polar alignment. The tube should be parallel to the fork arm which should be pointed to Pola

Based on your current alignment, NexStar will slew to where it thinks Polaris should be. Use the tripod’s tilt plate adjustment to place Polaris in t

Finding the North Celestial Pole Figure 6-6 The position of the Big Dipper changes throughout the year and the night. In each hemisphere, there is

With your telescope set up, you are ready to use it for observing. This section covers visual observing hints for both solar system and deep sky

SSoollaarr OObbsseerrvviinngg HHiinnttss • The best time to observe the Sun is in the early morning or late afternoon when the air is cooler. •

While your NexStar telescope requires little maintenance, there are a few things to remember that will ensure your telescope performs at its best.

You will find that additional accessories enhance your viewing pleasure and expand the usefulness of your telescope. For ease of reference, all the

lights. This includes mercury and high and low pressure sodium vapor lights. In addition, they also block unwanted natural light (sky glow) caused b

Congratulations on your purchase of the Celestron NexStar! The NexStar ushers in a whole new generation of computer automated technology. Simple

Appendix A - Technical Specifications OOOppptttiiicccaaalll SSSpppeeeccciiifffiiicccaaatttiiiooonnn Design Maksutov-Cassegrain Catadioptric Apertu

AAppppeennddiixx BB -- GGlloossssaarryy ooff TTeerrmmss A- Absolute magnitude The apparent magnitude that a star would have if it were obs

F - Focal length The distance between a lens (or mirror) and the point at which the image of an object at infinity is brought to focus. The focal

Resolution The minimum detectable angle an optical system can detect. Because of diffraction, there is a limit to the minimum angle, resolution. Th

Appendix D – Maps of Time Zones 44

1 2 3 12 1 Optical Tube 7 Battery Compartment 2 Star Pointer Finderscope 8 Tripod 3 Eyepiece 9 Accessory Tray / Leg Brace 4 Focuser Knob

CELESTRON TWO YEAR WARRANTY A. Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron w

Celestron 2835 Columbia Street Torrance, CA 90503 Tel. (310) 328-9560 Fax. (310) 212-5835 Web site at http//www.celest

The NexStar 4 comes completely pre-assembled and can be operational in a matter of minutes. The NexStar is conveniently packaged in one reusable s

You are now ready to attach the included visual accessories onto the telescope optical tube. The Eyepiece Figure 3-2 – The Rear Cell with Visual

Star Pointer Operation The star pointer is powered by a long life 3-volt lithium battery (#CR2032) located underneath the front portion of the Star

AAttttaacchhiinngg tthhee NNeexxSSttaarr ttoo tthhee TTrriippoodd The Celestron NexStar tripod is a sturdy, heavy duty mount on which to place