Celestron C8 XLT OTA

Your Price: $1,389.99
Celestron C8 XLT OTA
Part Number: 91020-XLT
Availability: 7 - 10 day delivery

Overview

  • 8" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2032 mm focal length (f/10)
  • 25 mm eyepiece included (81x)
  • Visual back allows for use with 1.25" accessories
  • 6x30 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes dovetail rail compatible with CG-5 Advanced Series mount

Description

General Features

  • 8" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2032 mm focal length (f/10)
  • 25 mm eyepiece included (81x)
  • Visual back allows for use with 1.25" accessories
  • 6x30 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes dovetail rail compatible with CG-5 Advanced Series mount

Specifications

Optical Design

Schmidt-Cassegrain

Aperture (mm)

203.2 mm (8 in)

Focal Length

2032 mm (80 in)

Formula:Focal Ratio

10

Focal Length of Eyepiece 1 (mm)

25 mm (0.98 in)

Formula:Magnification of Eyepiece 1

81 x

Finderscope

6x30

Star Diagonal

1.25

Optical Tube

Aluminum

Formula:Highest Useful Magnification

480 x

Formula:Lowest Useful Magnification

29 x

Formula:Limiting Stellar Magnitude

14

Formula:Resolution (Rayleigh)

0.69 arc seconds

Formula:Resolution (Dawes)

0.57 arc seconds

Formula:Light Gathering Power (Compared to human eye)

843 x

Secondary Mirror Obstruction

2.5 in (64 mm)

Formula:Secondary Mirror Obstruction by Diameter

31%

Formula:Secondary Mirror Obstruction by Area

9.77%

Optical Coatings

StarBright XLT

Optical Tube Length

17 in (432 mm)

Optical Tube Weight

12.5 lbs (5.67 kg)

Dovetail Compatibility

CG-5 Mount

 

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