Manual Celestron SkyProdigy 90 - 22091 (page 18 of 32) (English)

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displayed when the IDENTY button is pressed. This will not only

allow you to set the brightness of the object you want SkyProdigy

to identify but also the distance away from its current location.

• The Identify Filter can be set between 0 (very bright objects)

and 25.5 (extremely faint objects)

• The search radius lter can be set from 0° to 25.5°

Press ENTER to accept the value.

Allow Sun – This menu allows you to enable the Sun as an object

that will be displayed under the Solar System object catalog and

that can be used when using the Solar System alignment option.

Use the UP and DOWN Scroll buttons to toggle between “yes”

and “no” and press ENTER to accept.

Telescope Setup

Tracking - In addition to being able to move the telescope with the

hand control buttons, SkyProdigy 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.

Lunar Used for tracking the Moon when observing the

lunar landscape.

Solar Used for tracking the Sun when solar observing

using a proper solar lter.

Disable Turn tracking completely o.

Slew Limits – Sets the limits in altitude that the telescope can

slew. The slew limits prevent the telescope tube from slewing to

an object below the horizon or slewing to an object that is high

enough that the tube might hit one of the tripod legs. However,

the slew limits can be customized depending on your needs. For

example, if you would like to slew to an object that is close to the

zenith and are certain that the tube will not hit the tripod legs, you

can set the maximum slew limits to 90º in altitude. Setting your

limits to 0 and 90° will allow the telescope to slew to any object

above the horizon. Use the UP/DOWN Scroll buttons to increase

or decrease the numeric value from 0 to 90°. Press ENTER to

accept the values. Press BACK to exit the menu.

Direction Buttons – The direction a star moves in the eyepiece

varies depending on the optical accessories being used. This feature

can be used to change the direction that the stars moves in the

eyepieces when a particular arrow button is being pressed. To

reverse the button logic of the direction keys, press the MENU

button and select Direction Buttons from the Telescope Setup menu.

Use the ENTER button to select either the Azimuth buttons (left

and right) or Altitude buttons (up and down). Pressing the UP

and DOWN Scroll buttons to reverse the direction of the hand

control buttons from their current state. Press BACK to exit the

menu. Direction Buttons will only change the eyepiece rates

(rate 1-6) and will not aect the slew rates (rate 7-9).

Cordwrap – Cordwrap safeguards against the telescope slewing

more than 360º in azimuth and wrapping cables around the

base of the telescope. This is useful any time that the telescope

is powered using an external power supply. By default, the cord

wrap feature is turned on.

There may be a time when the telescope may not slew to an

object from the shortest distance but instead slew to the object

from the opposite direction. This is normal and necessary to

prevent power cord from wrapping around the telescope.

Backlash Compensation – All mechanical gears have a certain

amount of backlash or play between the gears. This play is

evident by how long it takes for a star to move in the eyepiece

when the hand control arrow buttons are pressed (especially

when changing directions). SkyProdigy’s backlash compensation

feature allows the user to compensate for backlash by inputting a

value which quickly moves the motors just enough to eliminate

the play between gears. The amount of compensation needed

depends on the slewing rate selected; the slower the slewing

rate the longer it will take for the star to appear to move in the

eyepiece. Therefore, the backlash compensation will have to

be set higher. You will need to experiment with dierent values;

a value between 20 and 50 is usually best for most visual observing.

Positive backlash compensation is applied when the mount

changes its direction of movement from backwards to forwards.

Similarly, negative backlash compensation is applied when

the mount changes its direction of movement from forwards

to backwards. When tracking is enabled, the mount will be

moving in one or both axes in either the positive or negative

direction, so backlash compensation will always be applied

when a direction button is released and the direction moved is

opposite to the direction of travel.

To set the anti-backlash value, scroll down to the backlash

compensation option and press ENTER. Enter a value from 0-99

for both azimuth and altitude directions and press ENTER after

each one to save these values. SkyProdigy will remember these

values and use them each time it is turned on until they are

changed.

StarSense Camera

StarSense Camera settings are an advanced level feature that allows

you to calibrate the telescopes camera and customize the camera

control settings.

Calibrate – Your telescope’s camera may need to be calibrated if

the telescope cannot nd objects after being successfully aligned.

To Calibrate the camera:

1. Slew the telescope to the bright star that you are trying to

nd.

2. Select Calibrate from the StarSense menu option.

3. The hand control will display the current pixel position of the

center of the camera sensor.

4. Use the direction buttons to manually center the bright star

in the eyepiece. Press ENTER.

SkyProdigy will then take an image of the sky and calibrate the

center of the camera sensor with the star seen in the eyepiece.

INSTRUCTION MANUAL

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Celestron SkyProdigy 90 - 22091 Manual

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