Basic Operation Of Telescope - Vixen SX SPHINX Instruction Manual

Basic Operation of Telescope
IV. Insert a long focal-length eyepiece into the
eyepiece holder and fix the eyepiece setscrew
securely.
V. Move the optical tube end of the telescope to
point at the object which you intend to see
(Object, which is located over 200 meters away,
such as a building, antennas, tower, utility poles)
by operating an arrow key. < >
t "i on the right side of the STAR
BOOK.
VI. Look into the eyepiece. Since it may be initially
out of focus, turn the focusing knobs slowly until
a clear image appears as shown in the Figure.
4
i
Focusing Knobs
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When no image is seen in daytime, the light
path of the flip mirror may not be on the side
of the eyepiece in which you are looking.
Turn the mirror shift knob in order to bring it
into the field of view.
Right-angled |
viewing
Straight-thru |
viewing.
Mirror Shift
| Knob
If you still can not see clearly, try the following:
VI-1. Nothing focuses at a very close range.
Distance to an object requires to be a
minimum of 200 meters. Point to a further
object.
Object may be out of view. Carefully point
the telescope again at the object.
VI-2.
VI-3.
Point the telescope again so that the
object is viewed.
When image is viewed totally white (light grey),
telescope may be pointing to the sky.
Basic
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When using a short focal-length eyepiece,you
may find it difficult to see an image, as it will be
dim and the field of view will likely be narrower.
Therefore,be sure to use an eyepiece with
a lower magnification to begin with.
The magnification power of a telescope is arrived
at by dividing the focal length of the telescope
with the focal length of the eyepiece.
Example: In case of telescope with 800mm focal length (FL).
Eyepiece : FLof telescope / FLof eyepiece = Magnification power
LV20mm : 800 mm / 20 mm = 40 magnification power (x40)
LV 5mm: 800 mm/5 mm = 160magnification power (x160)
In case of reflector type
whose eyepiece viewing |
position is located on
the tube side, you may
sometimes find it difficult
to view depending on the |
location of the eyepiece. | 1
In this case, loosen the
fixing knob of the optical a à
tube rings, and rotate the optical tube untilit becomes
easy to view. Remember to tighten the fixing knobs
of the optical tube rings again after rotation.
Tube Ring Lock |
Knobs
When operating the
telescope using keys
marked arrows, place |
the optical tube hori
-zontally as shown in |
the figure to start with.
The image in the eye | Straight- thru, y
-piece may appear viewing a
upside down.
Precisely speaking,
the image will appear
inverted (upside down)
and reversed left to | /
right when viewing ||
directly (or straight thru). |
When viewing at a
right angle with a diagonal, the i image will appear
right side up and reversed left to right.
An optional "correct image"eyepiece can match
the image orientation through the telescope to
the unaided viewing orientation.
i $
4 Right-angled |
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* The illustration is when the eyepiece in right angle
type is facing exactly upright. This may be different
when it does not face upright.
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