Celestron 93507 Optical Specification NexStar 8 GPS NexStar 11 GPS, Electronic Specifications

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Appendix A - Technical Specifications

Optical Specification

NexStar 8 GPS

NexStar 11 GPS

Design

 

Schmidt-Cassegrain Catadioptric

Schmidt-Cassegrain Catadioptric

Aperture

 

8" (203.2mm)

11" (279mm)

Focal Length

 

2032mm

2800mm

F/ratio of the Optical System

10

10

Primary Mirror:

Material

Fine Annealed Pyrex

Fine Annealed Pyrex

 

Coatings

Starbright Coatings - 5 step multi-layer process

Starbright Coatings - 5 step multi-layer

 

 

 

process

Secondary Mirror: Material

Hand Figured Fine Annealed Pyrex

Hand Figured Fine Annealed Pyrex

 

Coatings

Starbright Coatings - 5 step multi-layer process

Starbright Coatings - 5 step multi-layer

 

 

 

process

Central Obstruction

2.7"

3.75"

Corrector Plate:

Material

Optical Quality Crown Glass

Optical Quality Crown Glass

 

Coatings

A-R Coatings both sides

A-R Coatings both sides

Highest Useful Magnification

480x (~4mm eyepiece)

660x (~4mm eyepiece)

Lowest Useful Magnification (7mm exit pupil)

29x (~70mm eyepiece)

40x (~70mm eyepiece)

Magnification: Standard Eyepiece ( 40mm Pl)

51x

70x

Resolution: Rayleigh Criterion

.68 arc seconds

.50 arc seconds

Dawes Limit

.57 arc seconds

.42 arc seconds

Photographic Resolution (theoretic at 410nm)

200 line/mm

200 line/mm

Light Gathering Power

843x

1593x

Near Focus w/ standard eyepiece or camera

~25 feet

~60 feet

Field of View: Standard Eyepiece

.91º

.66º

: 35mm Camera

1º x .68º

.72º x .50º

Linear Field of View (at 1000 yds)

47.5 ft.

34.5 ft.

Optical Tube Length

21"

25"

Weight of Telescope

42 lbs

65 lbs

Weight of Tripod

 

26 lbs

26 lbs

Electronic Specifications

Input Voltage

12 V DC Nominal

Maximum

15 V DC Max.

Minimum

9 V DC Min.

Power Supply Requirements

12 VDC-1.5A (Tip positive)

Cord Management

Internal Slip Ring Design

Mechanical Specifications

Motor: Type

DC Servo motors with encoders, both axes

Resolution

.113 arc sec

Slew speeds

Nine slew speeds: 3º /sec, 2º /sec, .5º/sec, 64x, 16x, 8x, 4x, 1x, .5x

Hand Control

Double line, 16 character Liquid Crystal Display

 

19 fiber optic backlit LED keypad

Fork Arm

Dual Fork tine cast aluminum, with integrated hand control receptacle

Gears

5.625", precision bronze gears on both axes, 180 tooth

Bearings

9.5" Roller Azimuth Bearing

Optical Tube

Carbon Fiber

Software Specifications

Software Precision

16 bit, 20 arc sec. calculations

Ports

RS-232 communication port on hand control, Autoguider Port,

 

2 Auxiliary Port

Period Error Correction

Permanently programmable

Tracking Rates

Sidereal, Solar, Lunar

Tracking Modes

Alt-Az, EQ North & EQ South

Alignment Procedures

GPS Align, AutoAlign, Two-Star Align, Quick-Align, EQ North Align & EQ

 

South Align

Database

40,000+ objects, 50 user defined programmable objects.

 

Enhanced information on over 200 objects

Complete Revised NGC Catalog

7,840

Complete Messier Catalog

110

Complete IC Catalog

5,386

Complete Caldwell

109

Abell Galaxies

2,712

Solar System objects

9

Famous Asterisms

20

Selected CCD Imaging Objects

25

Selected SAO Stars

29,500

 

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Image 53
Contents Page Introduction Quick Setup Assembly Telescope Maintenance Appendix E Time Zone MAP SKY Maps Observational Data Sheet Page Center Leg Brace Tension KnobLeg Finderscope Alignment Star Auxiliary Port Control PanelAssembling the NexStar Setting Up The TripodAttaching the NexStar to the Tripod Adjusting the Tripod Height3a Attaching the Hand Control for NexStar 8 GPS Attaching the Hand ControlEyepiece Adjusting the ClutchesStar Diagonal Finderscope Finderscope InstallationAligning the Finderscope Powering the NexStarNexStar Hand Control Hand Control Operation Alignment ProceduresGPS Alignment Few Words on GPSHint Auto-AlignHelpful Helpful Hint Two Star AlignmentQuick-Align NexStar Re-Alignment EQ North / EQ South AlignmentFinding Planets Object CatalogSelecting an Object Slewing to an ObjectRate Button Tour ModeDirection Buttons Alt-Az Setup ProceduresEQ North EQ SouthScope Setup Features Menu Utility FeaturesHelpful Hint Menu Alignment List NexStar GPSImage Orientation Determining Field of View FocusingCalculating Magnification General Observing Hints Celestial sphere seen from the outside showing R.A. and DEC Celestial Coordinate SystemMotion of the Stars Wedge Align Polar Alignment with optional WedgeFinding the North Celestial Pole Definition Declination Drift Method of Polar AlignmentPage Observing the Planets Observing the MoonLunar Observing Hints Planetary Observing HintsObserving Deep Sky Objects Observing the SunSeeing Conditions TransparencySeeing Short Exposure Prime Focus Photography Full Lunar Phase ISO Crescent QuarterEyepiece Projection Planet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus PhotographyUsing Periodic Error Correction Periodic Error Correction PECTerrestrial Photography Reducing Vibration CCD ImagingMetering Fastar Compatible Optical System With Reducer/Corrector Fastar F/2 ImagingAuto Guiding Pin out diagram for Autoguider portCollimation Care and Cleaning of the OpticsCollimated telescope Should appear Super Modified Achromatic SMA Eyepieces 1 ¼ Page Page Electronic Specifications Optical Specification NexStar 8 GPS NexStar 11 GPSMechanical Specifications Software SpecificationsAppendix B Glossary of Terms Page Page Appendix C Longitudes Latitudes Georgia Minnesota Rhode Island Canada Communication Protocol Description PC Command Ascii Hand Control ResponseSend Any Track Rate Through RS232 To The Hand Control Send a Slow-Goto Command Through RS232 To The Hand ControlReset The Position Of Azm Or Alt Appendix E Maps of Time Zones Page Page Page Page Page Page Page Observational Data Sheet Celestron TWO Year Warranty

93507 specifications

The Celestron 93507 is a powerful and versatile telescope designed for both amateur and seasoned astronomers. This model combines advanced technologies and practical features to deliver an enriching stargazing experience. One of the standout characteristics of the Celestron 93507 is its robust optical design. It features a 90mm aperture, allowing users to capture bright, detailed views of celestial objects, from the lunar surface to distant galaxies. The telescope employs a Maksutov-Cassegrain optical design, known for its compact form factor and high-quality images, free from chromatic aberration.

In terms of usability, the Celestron 93507 is designed with an easy setup in mind. It comes equipped with a solid mount that provides stability during observation. The mount also includes slow-motion controls, facilitating smooth panning across the night sky, allowing astronomers to track celestial objects effortlessly. This feature is particularly beneficial for viewing planets and other fast-moving astronomical phenomena.

Furthermore, the telescope comes with high-grade optics, including fully coated glass elements that enhance light transmission and ensure sharper images with higher contrast. It includes two eyepieces — a low-power 25mm and a high-power 10mm — that provide versatility in viewing options, whether you’re looking at wide expanses of the night sky or zooming in on close details of lunar craters.

Additionally, the Celestron 93507 is compatible with various Celestron accessories, including solar filters and advanced eyepieces, enabling users to expand their observational capabilities. The telescope's compact design makes it portable, perfect for amateur astronomers who enjoy taking their telescope for trips to dark-sky locations.

Another noteworthy feature of this telescope is its durability. Built to withstand the rigors of outdoor usage, the materials used in the Celestron 93507 are resistant to wear and tear, ensuring that users can enjoy stargazing for years.

Overall, the Celestron 93507 is a well-rounded instrument that combines advanced optical technology, user-friendly features, and portability, making it an excellent choice for anyone looking to explore the wonders of the universe. Whether you're interested in planetary observation, lunar details, or deep-sky wonders, this telescope offers the tools necessary to make your astronomical explorations rewarding.