Celestron CGEM II Mode D'emploi page 17

• To slew to the object displayed, press ENTER
• To see the next tour object, press the DOWN key
Identify Button
Pressing the IDENTIFY button will search the mount's data-
base catalogs and display the name and angular distances
to the nearest matching objects from the telescope's current
location This feature can serve two purposes First, it can be
used to identify an unknown object in the field of view of your
eyepiece Additionally, Identify Mode can be used to find
other celestial objects that are close to the objects you are
currently observing
For example, if your telescope is pointed at the brightest
star in the constellation Lyra, choosing Identify will no doubt
return the star Vega as the star you are observing However,
the Identify feature will also search its NGC and Solar
System databases and display any planets or Deep Sky
objects that are close by In this example, the Ring Nebula
(M57) would display as being approximately 6° away
The brightness and proximity of the objects displayed can be
defined by the user using the Identify Filter under Telescope
Setup
Direction Buttons
The hand control has four direction buttons in the center
of the hand control which control the telescope motion in
altitude (up and down) and azimuth (left and right) The
telescope can be controlled at nine different speed rates
1 = 2x
2 = 4x
3 = 8x
4 = 16x
5 = 32x
Motor Speed Button
Pressing the MOTOR SPEED button (12) allows you
to instantly change the speed rate of the motors from
high speed slew rate to precise guiding rate or anywhere
in between Each rate corresponds to a number on the
hand controller key pad The number 9 is the fastest rate
(approximately 4° per second, depending on power source)
and is used for slewing between objects and locating
alignment stars The number 1 on the hand control is the
slowest rate (2x sidereal) and can be used for accurate
centering of objects in the eyepiece To change the speed
rate of the motors:
• Press the MOTOR SPEED key on the hand control
The LCD will display the current speed rate
• Press the number on the hand control that corresponds
to the desired speed
The hand control has a "double button" feature that allows
you to instantly speed up the motors without having to
6 = 3° / sec
7 = 1° / sec
8 = 2° / sec
9 = 4° / sec
choose a speed rate To use this feature, simply press the
arrow button that corresponds to the direction that you want
to move the telescope While holding that button down,
press the opposite directional button This will increase the
speed to the maximum slew rate
When using the UP and DOWN buttons on the hand control,
the slower slew rates (6 and lower) move the motors in the
opposite direction than the faster slew rates (7- 9) This is
done so that an object will move in the appropriate direction
when looking into the eyepiece (i e , pressing the up arrow
button will move the star upwards in the field of view of the
eyepiece) However, if any of the slower slew rates (rate 6
and below) are used to center an object in the starpointer,
you may need to press the opposite directional button to
make the telescope move in the correct direction
Help Button
In future firmware updates, this button will offer troubleshooting
tips For your convenience, it currently functions as a shortcut
to the Messier Catalog
Menu Button
The CGEM II mount contains many user-defined
setup functions designed to give the user control over the
telescopes many features All of the setup and utility features
can be accessed by pressing the MENU key and scrolling
through the options below
Tracking Menu
Tracking Mode – This allows you to change the way the
telescope tracks depending on the type of mount being used
to support the telescope The telescope has three different
tracking modes:
• EQ North – Used to track the sky when the telescope is
polar aligned in the Northern Hemisphere
• EQ South – Used to track the sky when the telescope
is polar aligned in the Southern Hemisphere
• Off – When using the telescope for terrestrial (land)
observation, the tracking can be turned off so that the
telescope never moves
Tracking Rate – In addition to being able to move the
telescope with the hand control buttons, your telescope
will continually track a celestial object as it moves across
the night sky The tracking rate can be changed depending
on what type of object is being observed:
• Sidereal – This rate compensates for the rotation of the
Earth by moving the telescope at the same rate as the
rotation of the Earth, but in the opposite direction When
the telescope is polar aligned, this can be accomplished
by moving the telescope in right ascension only
• Lunar – Used for tracking the Moon when observing the
lunar landscape
• Solar – Used for tracking the Sun when solar observing
with the proper filter
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