Celestron CGE1400 Instruction Manual Download Page 12 | Manualshive

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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

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Summary of Contents for CGE1400

Page 1: ... Sc ch hm mi id dt t C Ca as ss se eg gr ra ai in n O Op pt ti ic ca al l T Tu ub be e A As ss se em mb bl ly y I In ns st tr ru uc ct ti io on n M Ma an nu ua al l C C8 8 C C9 9 2 25 5 C C1 11 1 C C1 14 4 ...

Page 2: ... fully coated corrector for the finest anti reflection characteristics 8 OTA 8 OTA CF 9 25 OTA 9 25 OTA CF 11 OTA 11 OTA CF 14 OTA 14 OTA Part Number 91024 91023 91027 91026 91036 91035 91037 91038 XLT Focal Length 2032mm F 10 2032mm F 10 2350mm F 10 2350mm F 10 2800mm F 10 2800mm F 10 3910mm F 11 3910mm F 11 Eyepiece 25mm 1 25 81x 25mm 1 25 81x 25mm 1 25 94x 25mm 1 25 94x 40mm 1 25 70x 40mm 1 25 ...

Page 3: ...crew on the visual back to hold the star diagonal in place The 14 OTA comes with a 2 mirror diagonal that attaches directly onto the rear threads of the optical tube See figure 1 3 If you wish to change the orientation of the star diagonal loosen the set screw on the visual back until the star diagonal rotates freely Rotate the diagonal to the desired position and tighten the set screw I In ns st ...

Page 4: ...pped Thumbscrews 10 24x1 2 Two Phillips Head Screws 8 32x1 2 or 10 24x1 2 To install the finderscope 1 Attach the bracket to the optical tube To do this place the curved portion of the bracket with the slot over the two holes in the rear cell The bracket should be oriented so that the rings that hold the finder are over the telescope tube not the rear cell see Fig 1 4 Start threading the screws in...

Page 5: ...is it may take a few minutes to familiarize yourself with the directional change each screw makes on the finder Focusing The Schmidt Cassegrain focusing mechanism controls the primary mirror which is mounted on a ring that slides back and forth on the primary baffle tube The focusing knob which moves the primary mirror is on the rear cell of the telescope just below the star diagonal and eyepiece ...

Page 6: ...o the highest useful magnification The general rule is that 60 power can be used for every inch of aperture For example the C8 is 8 inches in diameter Multiplying 8 by 60 gives a maximum useful magnification of 480 power Although this is the maximum useful magnification most observing is done in the range of 20 to 35 power for every inch of aperture which is 160 to 280 times for the C8 telescope D...

Page 7: ...umber and the type of object best suited to that kind of imaging The above figure shows how the secondary mirror is removed when using the optional CCD camera at f 2 and the Fastar Lens Assembly Warning The secondary mirror should never be removed unless installing the optional Fastar Lens Assembly Adjustments to collimation can easily be made by turning the screws on the top of the secondary mirr...

Page 8: ...ir Spray at an angle to the lens for approximately two to four seconds Then use an optical cleaning solution and white tissue paper to remove any remaining debris Apply the solution to the tissue and then apply the tissue paper to the lens Low pressure strokes should go from the center of the corrector to the outer portion Do NOT rub in circles You can use a commercially made lens cleaner or mix y...

Page 9: ... view a star near the zenith Use a medium to high power ocular 12mm to 6mm focal length It is important to center a star in the center of the field to judge collimation Slowly cross in and out of focus and judge the symmetry of the star If you see a systematic skewing of the star to one side then re collimation is needed To accomplish this you need to tighten the secondary collimation screw s that...

Page 10: ...the screw in the opposite direction so that the star image is moving towards the center of the field of view 6 If while turning you notice that the screws get very loose then simply tighten the other two screws by the same amount Conversely if the collimation screw gets too tight then loosen the other two screws by the same amount 7 Once the star image is in the center of the field of view check t...

Page 11: ...dling or unauthorized repair Further product malfunction or deterioration due to normal wear is not covered by this warranty CELESTRON DISCLAIMS ANY WARRANTIES EXPRESS OR IMPLIED WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE EXCEPT AS EXPRESSLY SET FORTH HEREIN THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT IN ACCORDANCE ...

Page 12: ...eet 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 ...

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