Appendix A – Technical Specifications

Advanced Series

21021 / 21022

 

21026 / 21027

 

 

 

 

 

 

 

Specifications:

 

 

 

 

 

Optical Design

80mm (3.2") refractor

 

100mm (4") refractor

 

Focal Length

600mm F/7.5

 

900mm F/9

 

Finderscope

 

6x30

 

9x50

 

Mount

CG-5 Equatorial

 

CG-5 Equatorial

 

Eyepiece

20mm – 1.25" (30x)

 

20mm – 1.25" (45x)

 

Accessory tray

 

Yes

 

Yes

 

Tripod

2" Stainless Steel

 

2" Stainless Steel

 

Technical Specs

 

 

 

 

 

Highest Useful Magnification

 

189x

 

236x

 

Lowest Useful Magnification

 

11x

 

14x

 

Limiting Stellar Magnitude

12

 

12.5

 

Resolution: Rayleigh

1.73 arc seconds

 

1.38 arc seconds

 

Dawes Limit

1.45 arc seconds

 

1.16 arc seconds

 

Light Gathering Power

131x unaided eye

 

204x unaided eye

 

Field of View: standard eyepiece

1.67º

 

1.3º

 

Linear FOV (@1000 yds)

 

87.5 ft

 

70 ft

 

Optical Coatings - Standard

Fully Multi-Coated

 

Fully Multi-Coated

 

Optical tube length

23"

 

34"

 

Telescope Weight

 

42 lbs

 

50 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 arc sec 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

 

 

 

47

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Celestron C100ED-R, C80ED-R manual Appendix a Technical Specifications

C100ED-R, C80ED-R specifications

Celestron, a renowned name in the field of astronomy, has built a reputation for producing high-quality telescopes that are accessible to both amateur and professional astronomers alike. Among their impressive lineup are the Celestron C100ED-R and C80ED-R telescopes, both of which are crafted to enhance the observational experience through advanced optics and user-friendly features.

The Celestron C100ED-R, a 100mm refractor telescope, stands out for its premium extra-low dispersion (ED) glass, which delivers exceptional color correction and sharpness. This ED technology minimizes chromatic aberration, ensuring clearer and more colorful celestial images. The telescope boasts a focal length of 900mm, resulting in a focal ratio of f/9. This combination allows for high magnification capabilities while maintaining a wide field of view, perfect for observing both planetary details and deep-sky objects. The robust, yet lightweight design of the C100ED-R makes it highly portable, allowing for convenient stargazing sessions.

On the other hand, the C80ED-R is a 80mm refractor telescope that combines portability with performance. With its 600mm focal length and f/7.5 focal ratio, the C80ED-R is ideal for wide-field observations, making it easy to explore star clusters and large nebulae. Like its larger counterpart, the C80ED-R features ED glass, which prevents color distortion, allowing for clear and crisp images. The compact design is perfect for those who wish to travel or set up in tight spaces, ensuring that astronomy remains accessible.

Both telescopes are equipped with high-quality multi-coated optics that enhance light transmission, resulting in brighter images. Celestron's user-friendly mounting systems allow for smooth tracking of celestial objects, making it easier to follow objects as they move across the night sky. Additionally, these telescopes come with a variety of accessories, including premium eyepieces that enhance the viewing experience, and sturdy tripods that provide stable support during observations.

In summary, both the Celestron C100ED-R and C80ED-R offer exceptional features that cater to a variety of observing needs. With advanced ED optics, high-quality construction, and portability, they are ideal choices for aspiring astronomers looking to explore the wonders of the universe. Whether you're interested in planetary observation or deep-sky exploration, Celestron's C100ED-R and C80ED-R will not disappoint.