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time zone). Enter minutes “ahead of” or
“behind” UT (universal time). The minimum
time difference is 60 minutes.
• New York City is 300 minutes “behind”
UT
• Los Angeles is 480 minutes “behind” UT
• Rome is 60 minutes “ahead of” UT
• Beijing is 480 minutes “ahead of” UT
• Sydney is 600 minutes “ahead of” UT
All the time zones in North America are
behind UT, as shown in the following table.
So make sure it shows “behind” instead of
“ahead of” UT.
Time Zone Hours
behind UT
Enter
Minutes
Hawaii -10 600
Alaska -9 540
Pacific -8 480
Mountain -7 420
Central -6 360
Eastern -5 300
To adjust minutes, use the ◄ or ► key to
move the cursor, and the ▲ or ▼ button to
change the numbers. To change the
“behind” or “ahead of” UT, move the cursor
to “ahead of” and using ▲ or ▼ key to
toggle between “behind” and “ahead of”.
When the number is correct, press ENTER
and go back to the previous screen.
For other parts of the world, you can find out
your “time zone” information from internet,
such as
http://www.timeanddate.com/worldclock/
.
DO NOT COUNT DAYLIGHT SAVING
TIME.
If a GPS module is connected to the E-
mount, the local time, longitude and latitude
information will be received from satellites
after the link is established. Only Daylight
Time Saving and Time Zone settings are
needed. However, the local time and site
info also can be manually entered in case of
GPS malfunction or testing the mount
inside. It is always a good idea to do your
home work to get the GPS coordinates
before traveling to a new observation site.
A clear sky outside is needed for GPS to
communicate well with the satellites.
4.2.2. Using your telescope
Selecting an Eyepiece:
1. Always begin viewing with the lowest
power eyepiece. (Note: a 25 mm focal
length eyepiece has a lower power than a
10 mm one.) A formula can be used to
determine the power of each eyepiece:
Telescope focal length divided by eyepiece
focal length equals magnification. Ex.
400mm ÷ 25mm = 16X (magnification)
2. A 45° Erecting Diagonal Prism is included
in the R80 or MC90 telescope. The Erecting
Diagonal Prism is used to erect the image
you will see. Astronomical telescopes are
designed in such a way that the image you
see may be UPSIDE DOWN and
REVERSED. This is perfect for viewing
celestial bodies. However, it will feel strange
when observing a land object or a bird.
Focusing Telescope:
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 extend focusing tube by
turning the focus knob.
2. While looking through selected eyepiece,
slowly retract focusing tube by turning
focusing knob until object comes into focus.
Aligning Finderscope:
1. Look through Main Telescope Tube and
establish a well-defined target (see focusing
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