Celestron PowerSeeker 70AZ Руководство по эксплуатации - Страница 8

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Celestron PowerSeeker 70AZ Руководство по эксплуатации

nSTAlling The

iAgonAl And

The diagonal is a prism that diverts light at a right angle to

the light path of the refractor. This allows you to observe in

a position that is more comfortable than if you had to look

straight through. This diagonal is an erect image model

that corrects the image to be right side up and oriented

correctly left-to-right which is much easier to use for

terrestrial observing. Also, the diagonal can be rotated to

any position which is most favorable for you. To install the

diagonal and eyepiece:

1. Insert the small barrel of the diagonal into the 1.25"

eyepiece adapter of the focus tube on the refractor

– Figure 2-13. Make sure the two thumbscrews on the

eyepiece adapter do not protrude into the focuser tube

before installation and the plug-up cap is removed from

the eyepiece adapter.

nSTAlling The

iAgonAl And

The diagonal for the 50AZ is called a star diagonal where

the prism corrects the image to be right side up (erect

image) but the image is reversed right-to-left. The diagonal

and eyepieces are .96" diameter sizes. All steps above are

the same with the 50AZ.

nSTAlling The

yePiece on The

The eyepiece (or ocular) is an optical element that magnifies

the image focused by the telescope. Without the eyepiece

it would be impossible to use the telescope visually.

Eyepieces are commonly referred to by focal length and

barrel diameter. The longer focal length (i.e., the larger

the number) the lower the eyepiece magnification (i.e.,

power). Generally, you will use low-to-moderate power

when viewing. For more information on how to determine

power, see the section on "Calculating Magnification". The

eyepiece fits directly into the focuser of the Newtonian. To

attach the eyepieces:

1. Make sure the thumbscrews are not protruding into

the focuser tube. Then, insert the chrome barrel of the

eyepiece into the focus tube (remove the plug-up cap

of the focuser first) and tighten the thumbscrews – see

Figure 2-15.

nSTAlling And

Sing The

Your telescope also comes with a 3x Barlow Lens (2x with

the 40AZ) which triples the magnifying power of each

eyepiece. However, the greatly magnified images should

only be used under ideal conditions – see the Calculating

Magnification section of this manual.

To use the Barlow lens with refractors, remove the diagonal

and insert the Barlow directly into the focuser tube. You

then insert an eyepiece into the Barlow lens for viewing.

You can also, insert the diagonal into the Barlow lens and

then use an eyepiece in the diagonal, but you may not be

able to reach focus with all eyepieces.

yePiece

efrAcTor

yePiece

efrAcTor

ewToniAn

Arlow

enS

) – 60AZ

70AZ

And

2. Put the chrome barrel end of one of the eyepieces into

the diagonal and tighten the thumb screw. Again, when

doing this make sure the thumbscrew is not protruding

into the diagonal before inserting the eyepiece.

3. The eyepieces can be changed to other focal lengths by

reversing the procedure in step 2 above.

igure

) – 40AZ

50AZ

And

igure

2. The 20 mm eyepiece is called an erecting eyepiece since

it corrects the image, so it is right side up and corrected

left to right. This makes the telescope useful for

terrestrial viewing.

3. The eyepieces can be changed by reversing the

procedure as described above.

igure

For Newtonian telescopes, insert the Barlow lens directly into

the focuser. Then, insert an eyepiece into the Barlow lens.

Note: Start by using a low power eyepiece as it will be

easier to focus.

Arlow

enS

2-13

2-14

2-15

2-16

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