National Geographic NG90EQ owner manual Equatorial Mount

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Complete the following settings in daylight:

1)Insert the 25-mm eyepiece into the eyepiece holder. Look at an easily recognizable, stationary object that is at least 500 feet away. Slightly loosen all locking knobs and move the telescope until the object is in the center of the field of view. Then bring the image into focus.

2)Firmly retighten the locking knobs so that the telescope is locked in position.

3)Look through the finder scope. If the object is not visible or centered in the finder scope, simply release one of the three small adjusting screws holding the finder scope and reposition the finder scope until the object is centered within the X-shaped crosshairs. If the image seen through the finder scope is not clear, turn the eyepiece of the finder scope until the image comes into sharp focus.

4)All screws should be completely tightened as soon as the view through the finder scope coincides with the view of the main telescope.

5)This procedure may need to be repeated to ensure a perfect alignment.

THE EQUATORIAL MOUNT

Your telescope is equipped with an advanced equatorial mount. This type of mount moves the main optical tube in a circular fashion. This is very important because it means that you can set up the NG90EQ to conveniently compensate for the rotation of the Earth.

When you observe an astronomical subject through a telescope it will appear to move across the viewing area. At medium-power magnifications the image can appear to move across the whole viewing area in about 30 seconds. With a simple mounting system, called an altazimuth mount, it can be difficult and frustrating to track an object and keep it in view. The equatorial mount simplifies this operation, but it must be correctly set up.

Pick up and rotate the whole telescope until the front of the main optical unit is facing north. Look fairly high in the sky until you see the familiar star grouping called the Big Dipper. By following an imaginary line up from the two end stars of the dipper (the “pointers”), you will come to a single star with no other stars close by. This is Polaris, or the North Star. Loosen the altitude adjustment knob (See Fig. 21) and raise or lower the angle of the telescope until you can see Polaris centered in the finder scope. Be certain that your finder scope is properly aligned.

Declination knob

(Fig. 21.)

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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.
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