Telescope Maintenance

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

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.

TELESCOPE BASICS

ASTRONOMY BASICS

CELESTIAL OBSERVING

ASTROPHOTOGRAPHY

C5-S, C9-S, C8-S specifications