Which eyepiece is right?
First of all, it is important that you always choose an
eyepiece with the highest focal width for the beginning
of your observation. Afterwards, you can gradually
move to eyepieces with smaller focal widths. The focal
length is indicated in millimeters, and is written on
each eyepiece. In general, the following is true: The
larger the focal width of an eyepiece, the smaller the
magnification! There is a simple formula for calculating
the magnification:
Focal length of the telescope tube : Focal length of the
eyepiece = magnification
You see: The magnification is also depends on the focal
length of the telescope tube. This telescope contains a
telescope tube with focal length of 360 mm. From this
formula, we see that if you use an eyepiece with a focal
width of 20 mm, you will get the following magnification:
400 mm / 20 mm = 20 x magnification
To make things simpler, I’ve put together a table with
some magnifications:
Telescope
tube
focal width
Focal
width of
eyepiece
Magnification
400 mm
20 mm
20x
400 mm
6 mm
67x
Technical data:
• Design: achromatic
• Focal length: 400 mm
• Objective Diameter: 40 mm
All Parts (Telescope)
1 Focus wheel
2 Diagonal mirror
3 Eyepieces (6 mm, 20 mm)
4 Telescope (Telescope tube)
5 Dew Shield
6 Objective lens
7 Locating screw for the vertical
adjustment
(upward and downward motion)
8 Locating screw for the vertical axis
(for turning to the right and left)
9 Tripod legs
Your Telescope
Please look for a suitable location for your telescope
before you begin. Use a stable surface e.g. a table.
Mount the Telescope to the Tripod with the locating
screw for the vertical adjustment (7). Insert the eye piece
into the diagonal mirror
(6 mm or 20 mm).
Azimuth mounting
Azimuth mounting just means that you can move your
telescope up and down, left and right, without having to
adjust the tripod.
Use the locating screw for the vertical fine adjustment (7)
and the locating screw for the vertical axis (8) to locate
and lock the position of an object. (to focus an object)
Customer Service: Call 1-866-252-3811
40mm AZ Telescope Manual
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