b.c.

a.

Note: 10" model has 4 mirror clips

d.e.

Figure 25. Collimating the optics. (a) When the mirrors are properly aligned, the view down the focuser drawtube should look like this. (b) With the collimation cap in place, if the optics are out of alignment, the view might look something like this.

(c)Here, the secondary mirror is centered under the focuser, but it needs to be adjusted (tilted) so that the entire primary mirror is visible. (d) The secondary mirror is correctly aligned, but the primary mirror still needs adjustment. When the primary mirror is correctly aligned, the “dot” will be centered, as in (e).

applications that need to communicate with the motor control board directly.

Setup Functions

The Setup functions allow you to change any system variable or information regarding location, time, date, and alignment configurations. To access the Setup Functions, either press the SETUP button on the hand controller or browse to SETUP on the Choose Menu screen using the mode and scroll keys. The different types of functions available to you are listed below, along with their respective purposes.

Date: Allows you to change the date entered at the initial setup.

Time: Allows you to change the current time.

Observ. site: Allows you to change the current location set- ting.

Daylight Saving: Allows you to change the Daylight Saving option.

Alignment: Allows you to re-perform the star alignment.

Alignment Stars: Allows you to choose how alignment stars are displayed.

Auto Select: When selected the hand controller will filter out stars not available for selection.

Sort By: Generates a list of alignment stars sorted alpha- betically or by magnitude.

Backlash: This function allows you to insert a value for each axis to compensate for slewing backlash experienced on that axis. Backlash is a delay in motorized motion of the mount due to slack between gears. Backlash is experienced when the slewing direction is reversed on one or both axes of motion. For improved pointing accuracy, it is important that the back- lash value is set to be equal or greater than the actual amount of backlash between the gears. The default setting is 0° 00’ 00" (degree, arcminute, arcsecond). Use the numeric keys to set the values and press the RIGHT directional key to pro- ceed to the next digit. First set the value for R.A. backlash, then press ENTER to set the value for DEC.

Note: Backlash compensation is only active for comput- erized slewing, not for manual slewing with the direction- al buttons.

Tracking:

•Sidereal Rate: Activates tracking at sidereal rate. This is the default tracking rate.

•Lunar Rate: Activates tracking at lunar rate.

•Solar Rate: Activates tracking at solar rate.

•Stop Tracking: Stops the tracking motors.

Auto Tracking: Allows the telescope to automatically track a celestial object without star alignment. The hand controller will display the coordinates of the direction in which the telescope

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Orion 10135 XT10g, 10135XT12g, #10134 XT8g, 10134 XTBg instruction manual Setup Functions, Tracking
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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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