Celestron 8i manual Care and Cleaning of the Optics Collimation

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ASTRONOMY BASICS	28
The Celestial Coordinate System	28
Motion of the Stars	29
Polar Alignment (with optional Wedge)	30
Finding the North Celestial Pole	31
CELESTIAL OBSERVING	32
Observing the Moon	32
Observing the Planets	32
Observing the Sun	32
Observing Deep Sky Objects	33
Seeing Conditions	33
Transparency	33
Sky Illumination	33
Seeing	33
CELESTIAL PHOTOGRAPHY	35
Short Exposure Prime Focus Photography	35
Eyepiece Projection	36
Long Exposure Prime Focus Photography	37
Terrestrial Photography	39
CCD Imaging	39
TELESCOPE MAINTENANCE	40
Care and Cleaning of the Optics	40
Collimation	40
OPTIONAL ACCESSORIES	43
APPENDIX A – TECHNICAL SPECIFICATIONS	46
APPENDIX B – GLOSSARY OF TERMS	48
APPENDIX C –LONGITUDES AND LATITUDES	51
APPENDIX D – RS-232 CONNECTION	56
APPENDIX E – TIME ZONE MAPS	57
SKY MAPS	59

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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 Selecting an Object Object CatalogEQ North / EQ South Alignment NexStar Re-AlignmentTour 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 Lunar Observing Hints Observing the MoonObserving the Planets Observing the SunSky Illumination Observing Deep Sky ObjectsSeeing Conditions TransparencyPage Short Exposure Prime Focus Photography Full Eyepiece ProjectionPlanet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus PhotographyPage Reducing Vibration Terrestrial PhotographyCCD Imaging MeteringCollimation 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.