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3. Telescope Operation
3.1. Imaging Orientation
The image orientation of in an N114 scope is inverted, as shown in the following. The
image is upside-down and reversed from left-to-right. Practice your telescope mount on the
moving directions during the day time.
3.2. Selecting an Eyepiece
The magnification of a telescope is defined by the focal lengths of the telescope and the
eyepiece. A formula can be used to determine the power of each eyepiece: Telescope focal
length divided by eyepiece focal length equals magnification.
For example, an N114 telescope has a focal length of 1000mm. With a 25mm eyepiece,
the magnification will be
1000mm ÷ 25mm = 40X (magnification)
If you want more magnification, you may order higher power eyepieces. Note: a 25 mm
focal length eyepiece has a lower power than a 10 mm one. Always start with the lowest power
eyepiece for easy locating the objects.
3.3. Focusing Telescope
Practice telescope focusing during the daytime to get familiar with the scope.
(1) After selecting the desired eyepiece aim the telescope tube at a land-based target at
least 200 yards away (e.g. A telephone pole or building). Fully retract focusing tube by turning
the focus knob.
(2) While looking through selected eyepiece, slowly extend focusing tube by turning
focusing knob until object comes into focus.
3.4. Using Finder Scope
Check the LED battery on the finder. The finder uses a CR2032 Lithium button battery.
Slide a new battery into the battery compartment with "+" sign facing out. Turn on the switch on
the side of the finder. You should see a red dot on the front screen. There are two thumb screws
on the finder to adjust the red dot position on the screen. The one on the bottom is for up/down,
and the one on the side is for left/right
Aim the telescope to a distant object and center it in the eyepiece. The look through the
red dot finder and adjust two thumb screws to move the red dot pointing to the object. If the red
Actual image
orientation as seen
with the unaided eye
Figure 4. Image through a telescope
4
Inverted image, as
viewed with the
eyepiece in
telescope
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