Figure 7. Attaching the base feet to the base.

Figure 8. Secure the front panel to each side panel.

2. Assembly

Now that you have unpacked the boxes and familiarized yourself with all the parts in front of you, it is time to begin assembly.

Assembly of the Dobsonian Base

The base need only be assembled once, unless you disas- semble it for long-term storage. The assembly process should take about half an hour. All necessary tools are included in the packages. The two ground baseplates arrive preassem- bled with the motors, optical encoders, and motor housings installed. There is a protective strip of polyethylene foam material between the two base plates (Figure 5). Do not attempt to remove this material; it is glued in place. It is designed to keep dust out of the azimuth motor assembly and gears.

During initial assembly it is suggested to fasten the screws just enough to hold the panels together loosely. When all of the components are assembled, then perform the final tight- ening of each screw one or two turns at a time, alternating from one screw to the next to ensure all are tightened evenly. When tightening screws, tighten them until firm, but be careful not to strip the holes by over-tightening.

1.Turn the baseplate assembly upside-down and gently rest it on the azimuth motor housing. Locate the three starter holes on the perimeter of the bottom baseplate (Figure 6). Insert the screws through the feet and thread them into the predrilled starter holes (Figure 7) with the supplied Phillips screwdriver until tight.

2.Connect the side panels to the front panel (Figure 8). Use the coarse thread socket-head screws for this. There are unthreaded pilot holes (without the metal collar) to align these pieces. Orient the side panels so the oval XTg label is facing outward. Orient the front panel so that the pilot holes for the handle and eyepiece rack face out. The side panel with the motor attached is the left panel. There are six screws total (three for each side) to assem- ble. Start by inserting the screws and turning by hand to ensure they are going in straight. When you begin to meet resistance use the 4mm hex key to complete this

Figure 9. The completed side panel and front panel assembly (XT10g shown).

step. Do not completely tighten the screws yet. Having the boards a little loose will help in aligning the assembly to the top baseplate in step 3. The completed assembly should look like Figure 9.

2a. [For XT12g only] Attach a side brace to the outside sur- face of both the left and right side panels. Each side brace is attached with three base assembly wood screws. Insert the screws through the corresponding pre-drilled holes in the side panel and then thread them into the brace using the included 4mm hex key.

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Orion 10135XT12g, 10135 XT10g, #10134 XT8g, 10134 XTBg instruction manual Assembly of the Dobsonian Base
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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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