Celestron 94054 Руководство по настройке - Страница 2

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Celestron 94054 Руководство по настройке

2. Remove the dust cover and any dew shield connected to the

optical tube.

3. Use the included paper installation shield to cover the optics

during dew heater ring installation. This will help protect the

Schmidt corrector lens from inadvertent scratching, ﬁ ngerprints,

and dust. Place the paper shield over the Schmidt corrector

so the secondary obstruction ﬁ ts within the central hole in the

shield (Figure 4).

Fig 4

4. Use a Phillips-head screwdriver to carefully unthread and

remove the screws that connect the telescope's corrector

retaining ring to the front cell (Figure 5). For 5" through 9.25"

telescopes, there will be six screws to remove. For 11" and 14"

telescopes, there will be eight screws to remove.

Fig 5

5. Carefully remove the retaining ring from the telescope.

Also remove the gasket material ring underneath the plastic

retaining ring.(Figure 5b)

For 8", 9.25", and 11" telescopes only, there are two pins on

the interior of the front cell that are for the telescope's lens cap.

These will interfere with removing the retaining ring. Slightly

bend the plastic ring to provide clearance with one of the pins

so you can remove the ring.

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Fig 5b

6. Carefully place the dew heater ring where the retaining

ring was previously. Orient the dew heater ring so that the

compliance labeling on the ring is just to the right of the

telescope's dovetail when looking at the front of the tube

(see Figure 6). Line up the through holes in the dew heater

ring with the threaded holes in the telescope's front cell.

For 8", 9.25", and 11" telescopes only, the pins on the interior

of the front cell will interfere with installation of the of the

aluminum ring, but there is a notch in the ring's perimeter to

account for this. First, place the outer edge of the ring under

one of the pins. Then, rotate the ring until the notch lines up with

the other pin (Figure 6b), and you can now seat the ring onto

the lens cell. Once seated, rotate the ring until it is oriented as

indicated in Figure 6.

Fig 6

Fig 6b

7. Reinstall the screws removed previously. Only ﬁ nger tighten

initially. Then, when tightening the screws with your Phillips-head

screwdriver, use a cross pattern among the screws (Figure 7).

Only lightly tighten screws at ﬁ rst, so the head of the screw is just

above the retaining ring. When all screws are lightly installed,

begin ﬁ nal tightening of the screws, again in a cross pattern.

Make sure the screws are ﬁ rmly tightened but do not overtighten

them or you may strip the threads.

Retaining Ring

Gasket Ring

Compliance labeling

Dovetail

Notch