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Celestron C9.25 SCT - OTA

Celestron C9.25 SCT - OTA

Your Price: $1,899.99
7 - 10 day delivery
Part Number:91025-XLT

Overview

  • 9.25" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2350 mm focal length (f/10)
  • 25 mm eyepiece included (94x)
  • 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

  • 9.25" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2350 mm focal length (f/10)
  • 25 mm eyepiece included (94x)
  • 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)

234.95 mm (9.25 in)

Focal Length

2350 mm (93 in)

Formula:Focal Ratio

10

Focal Length of Eyepiece 1 (mm)

25 mm (0.98 in)

Formula:Magnification of Eyepiece 1

94 x

Finderscope

6x30

Star Diagonal

1.25

Optical Tube

Aluminum

Formula:Highest Useful Magnification

555 x

Formula:Lowest Useful Magnification

34 x

Formula:Limiting Stellar Magnitude

14.4

Formula:Resolution (Rayleigh)

0.59 arc seconds

Formula:Resolution (Dawes)

0.49 arc seconds

Formula:Light Gathering Power (Compared to human eye)

1127 x

Secondary Mirror Obstruction

3.35 in (85 mm)

Formula:Secondary Mirror Obstruction by Diameter

36%

Formula:Secondary Mirror Obstruction by Area

13%

Optical Coatings

StarBright / XLT

Optical Tube Length

22 in (559 mm)

Optical Tube Weight

20 lbs (9.07 kg)

Dovetail Compatibility

CG-5 Mount

 

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