INSTRUCTION MANUAL

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T-Adapter (#93633-A) - T-Adapter (with additional T-Ring) allows you to attach your SLR camera to the rear cell of your Celestron NexStar. This turns your NexStar into a high power telephoto lens perfect for terrestrial photography and short exposure lunar and filtered solar photography. T-Ring - The T-Ring couples your 35mm SLR camera body to the T-Adapter, radial guider, or tele-extender. This accessory is mandatory if you want to do photography through the telescope. Each camera make (i.e., Minolta, Nikon, Pentax, etc.) has its own unique mount and therefore, its own T-Ring. Celestron has 8 different models for 35mm cameras. Tele-Extender, Deluxe (#93643) - The tele-extender is a hollow tube that allows you to attach a camera to the telescope when the eyepiece is installed. This accessory is used for eyepiece projection photography which allows you to capture very high power views of the Sun, Moon, and planets on film. The tele-extender fits over the eyepiece onto the visual back. This tele-extender works with eyepieces that have large housings, like the Celestron Ultima series. Tripod, NexStar 5i (#93497) - A stable tripod is a must for serious astronomical observing and photography. This steel field tripod folds down to a compact 8"x28". It is equipped with a built-on 20 - 90 degree wedge tilt plate for quick equatorial use and astrophotography. It has a metal center brace and accessory tray for added stability. Tripod, NexStar 8i – (#93593) –This steel field tripod folds down to a minimum height of 28" and has a metal center brace and accessory tray for added stability. Vibration Suppression Pads (#93503) - These pads rest between the ground and tripod feet of your telescope. They reduce the amplitude and vibration time of your telescope when shaken by the wind or an accidental bump. This accessory is a must for long exposure prime focus photography. Wedge, NexStar (#93658) – The wedge allows you to tilt the telescope so that its polar axis is parallel to the earth's axis of rotation. Ideal for using your NexStar for guided astro photography. A full description of all Celestron accessories can be found in the Celestron Accessory Catalog (#93685) or on-line at www.celestron.com. 54
APPENDIX A – TECHNICAL SPECIFICATIONS Optical Specification NexStar 5i NexStar 8i Design Schmidt-Cassegrain Catadioptric Schmidt-Cassegrain Catadioptric Aperture 5 inches (127mm) 8 inches (203.2mm) Focal Length 50 inches (1250mm) 80 inches (2032mm) F/ratio of the Optical System 10 10 Primary Mirror: Material Coatings Fine Annealed Pyrex Starbright Coatings - 5 step multilayer Fine Annealed Pyrex Starbright Coatings - 5 step multilayer Secondary Mirror: Material Coatings process Hand Figured Fine Annealed Pyrex Starbright Coatings - 5 step multilayer process process Hand Figured Fine Annealed Pyrex Starbright Coatings - 5 step multilayer process Central Obstruction 2” (16% by area) 2.5” (10% by area) Corrector Plate: Material Coatings Optical Quality Soda Lime MgF2 Coatings both sides Optical Quality Crown Glass MgF2 Coatings both sides Highest Useful Magnification 300x ( ~ 4mm eyepiece) 480x ( ~ 4mm eyepiece) Lowest Useful Magnification (7mm 18x ( ~ 70mm eyepiece) 29x ( ~ 70mm eyepiece) exit pupil) Resolution: Rayleigh Criterion Dawes Limit 1.1 arc seconds .91 arc seconds .68 arc seconds .57arc seconds Photographic Resolution 200 lines/mm 200 lines/mm Light Gathering Power 329x unaided eye 843x unaided eye Near Focus standard eyepiece or ~ 20 feet ~ 25 feet camera Field of View: Standard Eyepiece : 35mm Camera 1.04º 1.6º x 1.1º (2.5º x 1.75º - with optional Reducer Corrector) Linear Field of View (at 1000 yds) 32 feet 48 feet Magnification: Standard Eyepiece 50x 81x : Camera 25x 41x Optical Tube Length 11 inches 17 inches Weight of Telescope 17.6 Lbs. 24 Lbs. .63º 1.0º x .68º (1.6º x 1.07º - with optional Reducer Corrector) Electronic Specifications Input Voltage Maximum Minimum Batteries Required Power Supply Requirements Mechanical Specifications Motor: Type Resolution Fork Arm Electronic Hand Control Specifications Slew speeds Tracking Modes 12 V DC Nominal 18 V DC Max. 8 V DC Min. 8 AA Alkaline 12 VDC-750 mA (Tip positive) DC Servo motors with encoders, both axes .26 arc sec in Azimuth, .32 arc sec in altitude Cast aluminum, with integrated hand control receptacle Six slew speeds: 6º /sec, 2º /sec, 128x, 64x, 16x, 8x Alt-Az, EQ North, EQ South , Off Optional Computerized Hand Control Specifications Hand Control Double line, 16 character Liquid Crystal Display 19 fiber optic backlit LED buttons Slew speeds Nine slew speeds: 6º /sec, 3º /sec, 1.5º/sec, 128x, 64x, 16x, 8x, 2x, 1x Software Precision 24bit, 0.08 arcsec calculations Ports RS-232 communication port on hand control Tracking Rates Sidereal, Solar and Lunar Tracking Modes Alt-Az, EQ North & EQ South Alignment Procedures 2-Star Alignment, AutoAlign, EQ North/South and GPS Align (with optional CN16 GPS Accessory) 55
Page 1 and 2:
® INSTRUCTION MANUAL 1 NexStar 5i
Page 3 and 4: TELESCOPE BASICS...................
Page 5 and 6: 10 1 2 3 9 4 8 5 7 6 Figure 1-A - T
Page 7 and 8: 5 in 7 Direction Buttons Focus Knob
Page 9 and 10: The Hand Control The hand control i
Page 11 and 12: 1. To turn on the Star Pointer, rot
Page 13 and 14: 5 1 2 4 3 Figure 4-1 The NexStar El
Page 15 and 16: 2. Press the STAR button on the han
Page 17 and 18: Your NexStar i-Series telescope is
Page 19 and 20: Alignment Procedures In order for t
Page 21 and 22: Helpful Hint 4. NexStar then asks y
Page 23 and 24: aligning your scope. For more infor
Page 25 and 26: Direction Buttons The NexStar has f
Page 27 and 28: To replace the contents of any of t
Page 29 and 30: Wedge Align - The NexStar has two e
Page 31 and 32: 1 2 APPENDIX C LONGITUDE LATITUDE d
Page 33 and 34: A telescope is an instrument that c
Page 35 and 36: distance of one thousand yards. The
Page 37 and 38: Motion of the Stars The daily motio
Page 39 and 40: Finding the North Celestial Pole In
Page 41 and 42: Observing the Sun Although overlook
Page 43 and 44: After looking at the night sky for
Page 45 and 46: eady for your next shot. Keep in mi
Page 47 and 48: Terrestrial Photography Your NexSta
Page 49 and 50: To verify collimation, view a star
Page 51 and 52: You will find that additional acces
Page 53: top or side of the telescope, makin
Page 57 and 58: Appendix B - Glossary of Terms A- A
Page 59 and 60: Right Ascension: (RA) resolution. t
Page 61 and 62: LONGITUDE LATITUDE degrees min degr
Page 63 and 64: LONGITUDE LATITUDE degrees min degr
Page 65 and 66: Appendix D - RS-232 Connection (for
Page 74 and 75: CELESTRON ONE YEAR WARRANTY A. Cele
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