EASTCOLIGHT Galaxy Tracker 375 User manual

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COMPONENTS OF THE TELESCOPE
1. Focusing Knob
2. Focusing Tube
3. Diagonal Mirror
4. Eyepiece
5. Telescope Tube
6. Tripod Legs
7. Knob bol
8. Objec ive Lens
9. Bracke
10. Barlow Lens
11. Smar phone Adap er
12. Smar phone Adap er Knob
Read the following information and instructions before use.
Follow them and keep them for reference.
M-32015-ENG
A) HOW TO CARE FOR YOUR TELESCOPE
Appropriate care of the telescope will allow many years of pleasant
viewing enjoyment.
The Objective Lens
The objective lens of Telescope has been intensely polished and
established to minute tolerances. It must be cleaned with care and
as seldom as possible to avoid affecting its precision and
performance. An inexperienced person must never take the lenses
out of their mount.
Cleaning The Lens
Clean the lens only when it is required. The first step is to remove
the dust with a camelhair brush or an ear-type syringe. Set few
drops of ether or isopropyl alcohol on a piece of clean cotton that
has been washed several times and wipe the lenses very delicately,
avoiding a circular motion. In addition, blow any remaining lint or
dust off with an ear-type syringe.
Sudden Temperature Changes
If possible, avoid taking the telescope from cold outside air into a
warm room. This will make the objective lens covered with
condensed moisture, which must be removed at once. To do this,
place the objective lens at a safe distance from heat source and let it
warm slowly until the moisture has vanished.
It is important to note that any stains left on the lenses must be
delicately wiped off after the lenses are completely dry.
Features:
Professional aspherical lens for super sharp images
This telescope employs aspherical lenses to reduce image
abberration often found in conventional spherical lens elements,
producing a sharp and less distorted image from the center to the
edge of the field of view.
Image from spherical lens Image from aspherical lens
Wide angle view
This telescope employs wide angle eyepieces, which offer a larger
view of the sky while still retaining the same magnification, giving a
greater area of sky coverage .
B) HELPFUL HINTS FOR SETTING UP THE TELESCOPE
Tripod Set-Up
1. Remove the tripod from the box.
2. Spread tripod legs (6) so that the leg braces are fully extended
and rest safely at the base of the tripod center post.
3. Fasten all locks to hold legs securely in place.
4. Temporarily remove the knob bolt.
Telescope Set-Up
1. Take out the Telescope Tube (5) from the box.
2. Put the telescope on the tripod such that the holes of the bracket
(9) align with the tripod’s knob bolt position. Re-install and
tighten the knob bolt.
Putting In Diagonal Mirror & Eyepiece
1. Insert diagonal mirror (3) into focusing tube (2). Secure by
tightening the small retaining screw.
2. Install the soft eyepiece cap over the eyepiece (4) if needed.
Insert eyepiece (4) into diagonal mirror (3). Secure by tightening
the small retaining screw.
Putting In The Barlow Lens
1. Remove the diagonal mirror (3) and
insert the Barlow lens (10) into the
focusing tube (2).
2. Now the eyepiece can then be inserted
into the Barlow lens. If needed, diagonal
mirror should be installed between the
Barlow lens and the focusing tube.
C) OBSERVING ASTRONOMICAL OBJECTS THROUGH
YOUR TELESCOPE
1. Glance through the main telescope’s eyepiece (4) for your object.
(Note : You may have to alter the angle of the telescope slightly.)
The object will most likely seem to be blurry at this stage, but that
is normal. You are just trying to get the object in the viewing field
of your telescope lens. Once you have accomplished this task,
fasten the knobs to keep the accuracy of your telescope steady.
2. Now adjust the Focusing Tube (2) by turning the Focusing Knob
(1) slowly back and forth until the blurred object becomes precise.
3. If you are going to be looking through the telescope for a short
period of time, you can insert the Eyepiece directly into the
Focusing Tube. To be more comfortable when using your
telescope for longer periods of time, place the Diagonal Mirror (3)
into the Focusing Tube and the Eyepiece into the Diagonal Mirror.
WARNING ! NOT SUITABLE FOR CHILDREN UNDER 36
MONTHS DUE TO SMALL PARTS. CHOKING
HAZARD. THIS TELESCOPE SET IS
APPROPRIATE FOR CHILDREN OVER 8
YEARS OLD. TO BE USED UNDER THE
DIRECT SUPERVISION OF ADULTS.
CAUTION ! DO NOT VIEW SUN THROUGH TELESCOPE AS
SERIOUS INJURY TO EYE MAY RESULT.
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Galaxy Tracker® 375 Smart Telescope

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D) HOW TO USE THE TELESCOPE
Our telescope offers an extensive selection of parts and accessories
for your telescope to further enhance the exploration of worlds beyond.
As well, it is a precision optical instrument certain to give many years
of enjoyment and entertainment.
i. Viewing
What you see through a telescope and how accurate you see it is a
function of three factors ;
•Power / Magnification
•Brightness
•Resolution / Clarity of image
It is a common misunderstanding that the more power you have, the
better it is. Indeed, essential functions of a telescope are to magnify
the image, or give the effect of being closer to object of observation.
However, there are limits to how much power to use effectively. With
every increase in magnification, there is a corresponding reduction of
brightness and resolution. Too much magnification and the image will
become dim and blurry so that the features of the object become
vague. For best view of any astronomical body, you must strike a
balance between the three viewing qualities.
Furthermore, with every increase in power, there is a decrease in field
of view. The field of view is the circle of sky you see as you look
through your telescope. The more you increase magnification, the
smaller that circle becomes. You will also notice that celestial bodies
seem to move fast across the field of view even at low powers. That
movement is still more recognizable at high powers. High power will
provide some dramatic views of lunar or planetary features, but can
also be somewhat frustrating until you acquire a certain level of
expertise at tracking objects smoothly.
ii. Power Strength : Selecting The Eye Lens
Power means the ability of telescope to increase an image, or
appear to bring the image closer to the viewer. Value of magnifying
power is distinguished by a number followed by an X (read power).
Therefore, If you view an object at 125X, you are seeing it as though
you are 125 times closer to that object.
Power is calculated by dividing the focal length of objective lens of
your telescope by the focal length of the eye lens you choose. The
focal length of the eye lens is usually indicated on the eyepiece itself.
For example : 4mm
500 mm (focal length of objective lens)
Example: ------------------------------------------------------- = 125 X (power)
4 mm (focal length of eyepiece)
The longer the focal length of the eyepiece, the less the magnifying
power of the telescope. Whereas the shorter the focal length, the
greater the power. Therefore, when choosing an eye lens to insert
the diagonal prism, you are actually selecting what magnifying
power you wish to use for inspection.
E) USING THE SMARTPHONE ADAPTER
Components of the Smartphone Adapter
1. Adjus able arm
2. Smar phone holder
3. Bracke
4. Quick release lever
5. Arc
6. Small knob
7. Eyepiece adap er
8. Large knob
9. Swing arm
10. Small screw
i. Attach The Smartphone To The Adapter
1) If the telescope clip (lower half) is connected to the smartphone
holder, separate them by pressing the quick release lever (4) and
sliding out.
2) Loosen the large knob (8) at the back of the adaptor and put the
smartphone on it with face up.
3) Adjust the position of the horizontal arm (1)
to fit the width of the smartphone and
tighten the large knob (8) just enough
to keep the phone in position.
4) Align the centre of the adaptor hole of the
swing arm (9) to the smartphone camera.
Tighten the screw so that the smartphone is
securely held in place.
5) Loosen the small knob (6) on the base of the clip and open the arc
of the ring (5).
6) Attach clip to the telescope
tube with the flat side in upper
position.
7) Close the ring, secure
by tightening the small knob (6).
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8) Slide the smartphone adapter to the telescope clip.
ii Using STAR WALK
TM
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A stargazing smartphone software application (e.g. Star Walk ™ 2 for
iOS and Android) helps you find and identify the celestial objects
easily.
Select “Take a Tour” (Menu Take a tour) to familiarize yourself
with the various app features.
The App language will follow your smartphone’s language setting.
Features Highlight:
IDENTIFY THE CELESTIAL OBJECTS
After the smartphone adapter is attached to the telescope, the
smartphone orientation is aligned with the telescope. Utilizing the
smartphone’s location and orientation, a star map application can
show the real time simulated sky view on the screen matching the
view through the telescope. Names of the stars or celestial objects
are shown on screen and automatically updated when users adjust
the telescope or move the telescope to a different location.
SEARCH AND DIRECT
Another advantage of using the application software is that users
can search for a celestial object. The screen will guide users which
direction to move the telescope.
iii. Using The Smartphone Eyepiece Adapter
The smartphone adapter is also equipped with an adapter to attach
to the telescope eyepiece for photo and video capture..
1. To remove the adapter from
the telescope, press the
quick release lever (4) and
slide the smartphone
adaptor out.
2. Loosen the small screw (10)
at the top. Attach the
adaptor-smartphone
assembly to the telescope
eyepiece as shown. The
adaptor should be fully
inserted into the eyepiece for
best results. Tighten the
small screw
3. With the camera app opened,
re-adjust the smartphone
camera position by slightly
loosening the main adaptor
screw if necessary. The
image circle should be at the centre of the screen. Adjust the
focus knob until the image is clear.
F) TECHNICAL SPECIFICATIONS
Objective Diameter : 50 mm (1.97”)
Focal Length : 500 mm
Eyepiece Diameter : 1.25” (31.7mm)
Eyepieces Focal Length : 20 mm, 4 mm
Barlow Lens : 3 X
Maximum Magnification : 375X
Accessories : Smartphone Adapter, Diagonal Mirror,
95cm Extendable Aluminium Tripod,
3X Barlow Lens
Eyepiece Chart & Power Limits
Eyepiece Power Power with 3X Barlow Lens
20 mm 25X 75 X
4 mm 125X 375 X
Enjoy using your New Generation Smart Telescope!
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