Celestron CGE 800 Instruction Manual
  1. Manuals
  2. Brands
  3. Celestron Manuals
  4. Telescope
  5. CGE800
  6. Instruction manual

Celestron CGE 800 Instruction Manual

Schmidt-cassegrain optical tube assembly
Hide thumbs Also See for CGE 800:

Advertisement

Table of Contents

C
8
●
C
8
●
S
c
h
m
i
d
t
-
S
c
h
m
i
d
t
-
O
p
t
i
c
a
l
T
u
b
O
p
t
i
c
a
l
T
u
b
I
n
s
t
r
u
c
t
i
I
n
s
t
r
u
c
t
i
C
9
.
2
5
●
C
9
.
2
5
●
C
a
s
s
e
g
r
a
i
n
C
a
s
s
e
g
r
a
i
n
e
A
s
s
e
m
b
e
A
s
s
e
m
b
o
n
M
a
n
u
a
l
o
n
M
a
n
u
a
l
C
1
1
C
1
1
1
l
y
l
y
●
C
1
4
●
C
1
4

Advertisement

Table of Contents
loading

Related Manuals for Celestron CGE 800

Summary of Contents for Celestron CGE 800

  • Page 1 ● ● ● ● ● ●...
  • Page 2 Once light rays enter the optical system, they travel the length of the optical tube three times. The optics of the Celestron Schmidt-Cassegrain telescopes have Starbright® coatings - enhanced multi-layer coatings on the primary and secondary mirrors for increased reflectivity and a fully coated corrector for the finest anti-reflection characteristics.
  • Page 3 Once this is done, you are ready to attach other accessories, such as eyepieces, diagonal prisms, etc. If you want to remove the visual back, rotate the slip ring counterclockwise until it is free of the rear cell. The star diagonal is a prism that diverts the light at a right angle to the light path of the telescope. This allows you to observe in positions that are physically more comfortable than if you looked straight through.
  • Page 4 “Calculating Magnification.” The Celestron tube assembly come with a finderscope used to help you locate and center objects in the main field of your telescope. To accomplish this, the finder has a built-in cross-hair reticle that shows the optical center of the finderscope.

  • Page 5: Aligning The Finderscope

    Slightly tighten the three nylon tipped thumbscrews on the front ring of the bracket to hold the finder in place. Once on, push the finder back until the O-ring is snug inside the back ring of the finder bracket. Hand tighten the three nylon tipped thumbscrews until snug. Aligning the Finderscope Accurate alignment of the finder makes it easy to find objects with the telescope, especially celestial objects.

  • Page 6: Image Orientation

    .9° by 52.5. This produces a linear field width of 47 feet at a distance of one thousand yards. The apparent field of each eyepiece that Celestron manufactures is found in the Celestron Accessory Catalog...
  • Page 7 However, the C14 optical tube has a 154 inch focal length with a F-ratio of f/11. When the secondary is removed and the CCD camera is placed at the Fastar position, the system becomes f/2, this is a unique feature to some Celestron telescopes (see figures...

  • Page 8: Care And Cleaning Of The Optics

    5 times larger and the object size 1/5 compared to that of f/10. (see Table below) Telescope Standard With Reducer/Corrector With Fastar Lens Model Cassegrain f/10 f/6.3 Accessory f/2 CGE 800 FOCAL 80" (2032mm) 50.4" (1280mm) 16" (406.4mm) LENGTH CGE 1400 154" (3910mm) 88.2" (2239mm) 29.4"...
  • Page 9 Internal adjustments and cleaning should be done only by the Celestron repair department. If your telescope is in need of internal cleaning, please call the factory for a return authorization number and price quote. Collimation The optical performance of your telescope is directly related to its collimation, that is the alignment of its optical system. Your telescope was collimated at the factory after it was completely assembled.
  • Page 10 Locate the collimation screw closest to where your finger is positioned. This will be the collimation screw you will need to adjust first. (If your finger is positioned exactly between two of the collimation screws, then you will need to adjust the screw opposite where your finger is located).

  • Page 11: Celestron Two Year Warranty

    Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron.
  • Page 12 Celestron 2835 Columbia Street Torrance, CA 90503 Tel. (310) 328-9560 Fax. (310) 212-5835 Web site at http//www.celestron.com Copyright 2005 Celestron All rights reserved. (Products or instructions may change without notice or obligation.) Item # 91024 -INST $10.00 05-05...

This manual is also suitable for:

Cge 1400C8C9.25C11C14

Table of Contents