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Appendix a – technical specifications – Celestron C8-S User Manual

Page 49

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49

Appendix A – Technical Specifications

Advanced Series

11071/11072

11025/11026

11045/11046

C5-S

C8-S

C9.25-S

Specifications:

Optical Design

127mm(5") Schmidt-Cassegrain 203mm (8") Schmidt-Cassegrain 235mm (9.25") Schmidt-Cassegrain

Focal Length

1250mm F/10

2032mm F/10

2350mm F/10

Finderscope

6x30 6x30 6x30

Mount

CG-5 Equatorial

CG-5 Equatorial

CG-5 Equatorial

Eyepiece

25mm Plossl (50x)

25mm Plossl (81x)

25mm Plossl (94x)

Star Diagonal

1.25" 1.25" 1.25"

Accessory tray

Yes Yes Yes

Tripod

2" Stainless Steel

2" Stainless Steel

2" Stainless Steel

Technical Specs

Highest Useful Magnication

300x 480x 555x

Lowest Useful Magnification

18x 29x 34x

Limiting Stellar Magnitude

13 14 14.4

Resolution: Rayleigh

1.1arc seconds

.68 arc seconds

.59 arc seconds

Dawes Limit

.91 arc seconds

.57 arc seconds

.49 arc seconds

Photographic Resolution

200 line/mm

200 line/mm

200 line/mm

Light Gathering Power

329x unaided eye

843x unaided eye

1127x unaided eye

Field of View: standard eyepiece

1º .64º .55º

Linear FOV (@1000 yds)

52.5 ft.

33.6 ft.

29 ft.

Optical Coatings - Standard

Starbright Coating

Starbright Coating

Starbright Coating

Secondary Mirror Obstruction

1.75" 2.7" 3.35"

by Area

12% 11% 13%

by Diameter

35% 34% 36%

Optical tube length

14 inches

17 inches

22 inches

Telescope Weight

48 lbs

54.5 lbs

73 lbs

Advanced GT

Additional Specifications

Hand Control

Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons

Motor: Type

DC Servo motors with encoders, both axes

Max Slew Speed

3º/second

Software Precision

24bit, 0.08 arcsec calculation

Hand Control Ports

RS-232 communication port on hand control

Motor Ports

Aux Port, Autoguide Ports

Tracking Rates

Sidereal, Solar and Lunar

Tracking Modes

EQ North & EQ South

Alignment Procedures

AutoAlign, 3-Star Alignment, Quick Align, Last Align

Database

40,000+ objects, 400 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

Total Object Database

45,492

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