Attaching the Optical Tube

azimuth adjustment bolts. It may be necessary to partially unscrew the bolts to allow the metal peg to fully extend into the altazimuth housing.

4.Tighten the knob located on the underside of the tripod head. This will hold the equatorial mount firmly to the tripod head.

Attaching the Accessory Tray

Next, attach the accessory tray to the tripod. Locate the accessory tray and the three wingnut screws to attach the tray.

1.Place the accessory tray on the center support brace of the tripod and align the holes on the tray with those on the support brace.

2.Insert the wingnut screws through the bottom of the tripod support brace and thread them into the accessory tray holes.

With the accessory tray in place, the tripod will be much more stable, making it easier to attach the telescope.

Installing the Counterweight Bar

With the mount securely in place, you are ready to attach some of the accessories (the telescope tube will be added last). Start with the Counterweight Bar and Counterweights. Used to balance the telescope, the Counterweight Bar attaches to the opposite side of the mount as the telescope. To install the Counterweight Bar:

Retract the counterweight bar lock nut by turning it counterclockwise. This will expose the threads on the end of the Counterweight Bar.

Thread the Counterweight Bar into the mount completely. It threads into the mount opposite the telescope.

1.Tighten the lock nut fully for added support.

2.The Counterweight Bar is now installed.

3.Installing the Counterweights

With the counterweight bar in place, you are ready to attach the counterweights.

1.Remove the safety thumbscrew on the end of the counterweight bar.

2.Loosen the counterweight lock screw (on the counterweight itself) so that the central hole of the counterweight is unobstructed.

3.Slide the counterweight onto the counterweight bar. Move it high enough to allow room for the second weight (if included).

4.Tighten the counterweight lock screw to hold it in position.

5.Repeat this process for the second weight.

6.Replace the thumbscrew on the end of the counterweight bar. The thumbscrew will prevent the counterweight(s) from sliding off the bar should they ever become loose.

91510 specifications

The Celestron 91510 is a remarkable telescope that offers astronomy enthusiasts a blend of quality, portability, and advanced features, making it a popular choice for both beginners and seasoned stargazers alike. Known for its impressive optics, the Celestron 91510 utilizes a 70mm refractor design that provides bright and clear images, ideal for observing celestial objects such as planets, stars, and deep-sky phenomena.

One of the standout features of the Celestron 91510 is its fully coated optics, which enhance light transmission and improve image quality. This ensures that users can observe fine details in celestial bodies, such as the rings of Saturn or the craters on the Moon. The telescope comes with two eyepieces of different focal lengths, allowing for varying magnification. This versatility enables users to explore the night sky with ease, offering both wide-field views of star clusters and higher magnification for detailed observations.

Portability is another significant advantage of the Celestron 91510. Designed with travel in mind, this telescope is lightweight and compact, making it easy to set up and transport. It features a sturdy yet portable mount that provides stable support during observations. The pan-and-tilt head allows for smooth tracking of celestial objects, ensuring that users can focus on their targets without hassle.

Moreover, the telescope includes a red dot finder which aids in locating objects quickly in the night sky. This user-friendly feature is especially beneficial for beginners who may find it challenging to navigate the stars. The adjustable tripod provides a stable base and can be set to various heights, ensuring comfort during extended viewing sessions.

Celestron's commitment to quality and innovation is evident in the design of the 91510. It incorporates durable materials that withstand the rigors of outdoor use, ensuring longevity. Additionally, the telescope's overall aesthetic appeal, complete with a sleek design, adds to the enjoyment of using this astronomical instrument.

In summary, the Celestron 91510 is an excellent choice for anyone looking to delve into the wonders of astronomy. With its high-quality optics, user-friendly features, and portability, it offers an enjoyable stargazing experience. Whether you are a novice wanting to explore the cosmos or an experienced astronomer seeking a reliable companion, the Celestron 91510 stands out as an exceptional option.