3. The GoTo Hand Controller

The SkyQuest XTg features the SynScan AZ hand controller, which provides two different modes of operation:

AutoTracking Mode

The SkyQuest XTg base incorporates a quad-encoder design that records the position of the telescope relative to the sky. In the AutoTracking mode, after a quick initial alignment pro- cedure, you can move the telescope manually, or electroni- cally by using the directional buttons on the hand controller, to any position and the telescope will track the motion of the sky, keeping your viewing target in the eyepiece field of view indefinitely. Basically, this mode allows you to operate your Dobsonian in the traditional way, with the added bonus of automatic tracking.

GoTo Mode

GoTo mode provides automated, computerized object loca- tion, i.e., “GoTo” functionality to assist you in finding and enjoy- ing thousands of night sky objects such as planets, nebulas, star clusters, galaxies, and more. You can slew the telescope automatically to any of 42,000 celestial objects, or take a pre- programmed tour the skies, with push-button simplicity. Once the scope has pinpointed your desired observing target, the telescope will track its motion, keeping it in the field of view. Even inexperienced astronomers will find themselves quickly mastering the variety of features the SynScan AZ GoTo sys- tem offers in just a few observing sessions.

GoTo Hand Controller’s Features and Functions

The GoTo hand controller (Figure 22a) allows direct access to all the motion controls of the telescope and a database with some 42,000 pre-set objects. The controller comes with a two-line, 16-character LCD screen that is backlit for comfort- able viewing of the telescope information and scrolling text.

On the bottom end of the hand controller are three ports: a wide RJ-45 port for the cable that connects the hand control- ler to the GoTo base, an RJ-12 port that is used to connect the hand controller to a PC (with provided RS-232 cable) for firmware updates, and a DC power jack, which allows inde- pendent use of the hand controller for browsing the database or updating the firmware without connecting to the telescope (Figure 22b).

NOTE: The DC power port on the hand controller is for hand controller stand-alone applications only, such as updating the firmware without connecting to the telescope. For telescope operation, your 12V power source should be plugged into the 12V DC port on the Dobsonian base.

There are four main categories of control buttons on the GoTo hand controller (Figure 22a):

1)Mode buttons

2)Directional buttons

3)Scroll buttons

4)Dual purpose buttons

a.

Display screen

Mode buttons

Directional buttons

Dual purpose buttons

Scroll buttons

b.

Hand controller

Computer

12V DC

RJ-45 port

interface

power port

 

RJ-12 port

 

Figure 22. a) The SkyQuest XTg SynScan AZ hand controller’s button layout, b) the bottom end of the hand controller.

Mode Buttons

The three mode buttons are located at the top of the con- troller, directly below the LCD display. They include the ESC, ENTER, and SETUP buttons:

The ESC button is used to escape from a certain command or go back a level in the menu tree.

The ENTER button is used to select the functions and sub- menus in the menu tree, and to confirm certain functional operations.

The SETUP button is a quick hot key that takes you to the Setup submenu

Directional Buttons

The directional buttons allow the user to have complete control of the telescope at almost any step in the operation. These controls are locked out when the telescope is slewing to an object. The directional buttons are very helpful for the initial alignment of the GoTo system, for centering objects in the eyepiece field of view, and for manually slewing the tele-

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Orion #10134 XT8g, 10135 XT10g, 10135XT12g, 10134 XTBg instruction manual GoTo Hand Controller
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10135 XT10g, 10134 XTBg, 10135XT12g, #10134 XT8g specifications

The Orion #10134 XT8g, #10135 XT12g, #10134 XTBg, and #10135 XT10g are exceptional choices in the realm of computerized telescopes, catering to both novice stargazers and seasoned astronomers. These models are designed for easy use while delivering stellar performance and high-quality optics.

At the heart of these telescopes is the high-quality optics that Orion is renowned for. Each model features a primary mirror made from durable glass, enhanced with a parabolic shape to minimize optical distortions and improve light gathering capabilities. The XT8g and XT10g utilize an 8-inch and 10-inch mirror, respectively, while the XT12g boasts a large 12-inch aperture, providing users with deeper views of celestial phenomena. The larger the aperture, the more light the telescope can collect, revealing fainter objects in the night sky.

In terms of technology, the "g" designation signifies that these telescopes are equipped with Orion’s innovative GoTo system. This advanced motorized mount enables users to easily locate and track celestial objects with the push of a button, making the stargazing experience more enjoyable and accessible. The system includes a database of thousands of celestial objects, allowing users to explore the universe with ease.

The XTg models also come with an intuitive hand controller that features a user-friendly interface for navigating the night sky. Additionally, the telescopes can be controlled via a smartphone or tablet, providing flexibility for tech-savvy users who prefer modern conveniences.

Durability and stability are crucial in any telescope, and the XT series does not disappoint. Each model is constructed on a robust and stable base, designed to minimize vibrations and provide a steady view, even at higher magnifications. This stability ensures that amateur astronomers can enjoy detailed views, from the craters of the moon to the rings of Saturn and beyond.

Each telescope comes with a cradle-style altazimuth mount for easier adjustments and tracking capabilities. The included eyepieces allow for various magnifications, enhancing the viewing experience and enabling observers to appreciate the beauty of the cosmos.

In summary, the Orion XT series, including the #10134 XT8g, #10135 XT12g, #10134 XTBg, and #10135 XT10g, stands out for their exceptional optics, innovative GoTo technology, robust build quality, and user-friendly operation. These telescopes are ideal for anyone wishing to explore the wonders of the night sky, making them a worthy investment for years of astronomical discovery.
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