National Geographic NG90EQ owner manual Using Your Telescope for Terrestrial Viewing

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When possible, avoid sudden temperature changes, as the moisture in the air will condense on the objective lens. Should this occur after bringing your telescope inside, leave the lens cap off the objective lens, tilt the objective (front) lens facedown, and wait until the telescope reaches room temperature.

USING YOUR TELESCOPE FOR TERRESTRIAL VIEWING

When viewing objects on land, the circular motions of the equatorial mount prove to be a distraction. We are much more familiar with tracking objects by moving from side to side and up and down. The following directions will explain how to set up the equatorial mount to operate in such a manner.

Loosen the right ascension tightening knob (See Fig. 23) and carefully rotate the main optical unit until the counterweight shaft is horizontal with the ground. While this knob is loosened you can adjust the position of the counterweight to balance it with the telescope so that the counterweight shaft stays level. You can now control the vertical motion of the telescope by loosening the right ascension tightening knob (See Fig. 23), and you can adjust the horizontal movement by loosening the azimuth locking knob (See Fig. 24).

Right ascension tightening knob

(Fig. 23)

Azimuth locking knob

(Fig. 24)

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Contents NG90EQ Parts of your NG90EQ Telescope Introduction Assembly Page Page Finder Scope Alignment Equatorial Mount Word about the TWO Eyepiece Ports Eyepiece Power Power With 3X Barlow Lens About MagnificationUsing Your Telescope for Astronomical Viewing Using Your Telescope for Terrestrial Viewing Right ascension tightening knob Azimuth locking knobCare and Cleaning of Optics What to Look for in the Night SKYMoon PlanetsFrequently Asked Questions How far can I see?Why can’t I see anything through my telescope? Made in China

NG90EQ specifications

The National Geographic NG90EQ is a premium-quality, fully-equipped equatorial telescope that provides amateur astronomers and enthusiasts with an exceptional viewing experience. This powerful telescope is ideal for both planetary observation and deep-sky tracking, making it a versatile addition to any stargazer's collection.

One of the standout features of the NG90EQ is its impressive 90mm aperture. This large lens collects ample light, allowing for bright and detailed images of celestial bodies. With a focal length of 900mm, the telescope offers a focal ratio of f/10, which is well-suited for high-magnification observation. This design ensures that users can easily spot planets like Jupiter and Saturn, as well as a variety of stars and nebulae.

The NG90EQ is equipped with an equatorial mount, an essential component for tracking celestial objects as they move across the night sky. This mount allows users to precisely align the telescope with the North Star, simplifying the process of finding and following planets and stars. The included setting circles further assist in locating astronomical objects, making it easier for newcomers to explore the night sky.

Another notable characteristic of the NG90EQ is its user-friendly design. The telescope features an adjustable, ergonomic tripod that provides stability and supports easy height adjustment. With an optical finderscope, users can quickly locate objects before zooming in with the main telescope. The scope also includes high-quality eyepieces, offering multiple magnification options for varied viewing experiences.

Durability is a key aspect of the NG90EQ, as it is built with robust materials that withstand regular use. Its compact design makes it portable, perfect for taking to dark sky locations away from city lights. The telescope's ease of assembly means that novice astronomers can set it up in a matter of minutes, encouraging exploration and learning.

In summary, the National Geographic NG90EQ telescope stands out due to its excellent optical performance, user-friendly features, and sturdy construction. With its equatorial mount and quality optics, this telescope is perfect for discovering the wonders of the universe, making it a fantastic choice for both beginners and seasoned astronomers alike.