Autoguide Rates

26

Azimuth Limits

26

East/West Filtering

27

Utility Features

27

Calibrate Goto

27

Home Position

27

Polar Align

27

Light Control

28

Factory Settings

28

Version

28

Get Alt-Az

28

Goto Alt-Az

28

Hibernate

28

Turn On/Off GPS

28

ASTRONOMY BASICS

30

The Celestial Coordinate System

30

Motion of the Stars

31

Finding the North Celestial Pole

33

Declination Drift Method of Polar Alignment

34

CELESTIAL OBSERVING

35

Observing the Moon

35

Lunar Observing Hints

35

Observing the Planets

35

Observing the Sun

35

Solar Observing Hints

36

Observing Deep Sky Objects

36

Seeing Conditions

36

Transparency

36

Sky Illumination

36

Seeing

36

ASTROPHOTOGRAPHY

38

Short Exposure Prime Focus Photography

38

Eyepiece Projection

39

Long Exposure Prime Focus Photography

40

Terrestrial Photography

42

Metering

42

Reducing Vibration

42

CCD Imaging

42

Auto Guiding

43

TELESCOPE MAINTENANCE

44

Care and Cleaning of the Optics

44

Collimation

44

OPTIONAL ACCESSORIES

46

APPENDIX A – TECHNICAL SPECIFICATIONS

49

APPENDIX B – GLOSSARY OF TERMS

50

APPENDIX C – LONGITUDES AND LATITUDES

53

APPENDIX D – RS-232 CONNECTION

58

APPENDIX E – TIME ZONE MAP

60

SKY MAPS

62

 

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Celestron C8-S, C5-S, C9.25-S instruction manual Telescope Maintenance

C9.25-S, C5-S, C8-S specifications

Celestron, a leader in the field of amateur and professional astronomy, offers a range of telescopes ideal for both novices and experienced stargazers. Among their most celebrated models are the C8-S, C5-S, and C9.25-S, each designed with unique features and technologies that enhance the observational experience.

The Celestron C8-S is an iconic telescope known for its 8-inch aperture. This Schmidt-Cassegrain design combines a compact form factor with a powerful light-gathering capability, making it perfect for deep-sky observing. Its optical tube has a focal length of 2032mm, providing an excellent balance of wide field viewing and high magnification. The C8-S features Celestron's StarBright XLT optical coating, enhancing light transmission and contrast, ensuring that even faint objects are visible. With compatibility for various accessories and a sturdy mount, the C8-S stands as a versatile option for different observing styles.

Moving to the C5-S, this model boasts a 5-inch aperture while maintains a compact and portable design. It is particularly popular among travelers and casual astronomers who value convenience without compromising on quality. The C5-S also employs the Schmidt-Cassegrain design, providing sharp images and improved color correction. With its shorter focal length of 1250mm, the C5-S excels in both planetary and deep-sky observation. The telescope's lightweight build makes it easy to transport, while the integrated optical systems ensure a clear view of celestial objects.

The C9.25-S represents a step up in performance, featuring a 9.25-inch aperture that captures more light than its smaller counterparts. This telescope offers a versatile focal length of 2350mm, allowing for impressive high-power planetary views, as well as detailed observations of deep-sky objects. The C9.25-S utilizes a unique StarBright XLT coating and features advanced optics that minimize optical distortion, resulting in sharp, high-contrast images. It is equipped with a sturdy mount that ensures stability during extended observation sessions.

All three models are compatible with Celestron's advanced computer-driven mount systems, allowing for effortless tracking and alignment. With built-in features such as GoTo technology, users can easily locate thousands of celestial objects with the touch of a button. This combination of advanced optics, portability, and user-friendly technology makes the Celestron C8-S, C5-S, and C9.25-S excellent choices for anyone looking to explore the cosmos more deeply. Whether for casual stargazing or serious astronomical study, these telescopes deliver exceptional performance to meet a variety of needs.