Get Alt-Az

28

Goto Alt-Az

28

Hibernate

28

Turn On/Off GPS

28

TELESCOPE BASICS

30

Image Orientation

30

Focusing

31

Aligning the Finderscope

31

Calculating Magnification

31

Determining Field of View

32

General Observing Hints

32

ASTRONOMY BASICS

33

The Celestial Coordinate System

33

Motion of the Stars

34

Finding the North Celestial Pole

36

Declination Drift Method of Polar Alignment

37

CELESTIAL OBSERVING

38

Observing the Moon

38

Lunar Observing Hints

38

Observing the Planets

38

Observing the Sun

38

Solar Observing Hints

39

Observing Deep Sky Objects

39

Seeing Conditions

39

Transparency

39

Sky Illumination

39

Seeing

39

ASTROPHOTOGRAPHY

41

Short Exposure Prime Focus Photography

41

Eyepiece Projection

42

Long Exposure Prime Focus Photography

43

Terrestrial Photography

45

Metering

45

Reducing Vibration

45

CCD Imaging

45

Auto Guiding

46

TELESCOPE MAINTENANCE

47

Care and Cleaning of the Optics

47

Collimation

47

OPTIONAL ACCESSORIES

49

APPENDIX A – TECHNICAL SPECIFICATIONS

52

APPENDIX B – GLOSSARY OF TERMS

53

APPENDIX C – LONGITUDES AND LATITUDES

56

APPENDIX D – RS-232 CONNECTION

61

APPENDIX E – TIME ZONE MAP

63

SKY MAPS

65

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

C5-S, C9-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.