Fig. 15: 25mm and 9mm eyepieces.

DEFINITION:

A capital "X" is used to denote an eye- piece's (or a Barlow's) power or magnification. For example, "40X" is read as "40-power."

image) has been aligned to the main telescope. Fig. 13B shows these same images after the viewfinder and main telescope are aligned.

5.Check this alignment on a celestial object, such as the Moon or a bright star, and make any necessary refinements.

Choosing an Eyepiece

A telescope’s eyepiece magnifies the image formed by the telescope’s main optics. Each eye- piece has a focal length, expressed in millimeters, or “mm.” The smaller the focal length, the higher the magnification. For example, an eyepiece with a focal length of 9mm has a higher magnification than an eyepiece with a focal length of 25mm.

Your telescope comes supplied with a low-powered 25mm eyepiece which gives a wide, com- fortable field of view with high image resolution.

Low power eyepieces offer a wide field of view, bright, high-contrast images, and eye relief dur- ing long observing sessions. To find an object with a telescope, always start with a lower power eyepiece such as a 25mm. When the object is located and centered in the eyepiece, you may wish to switch to a higher power eyepiece to enlarge the image as much as practical for pre- vailing seeing conditions.

NOTE: Viewing conditions vary widely from night-to-night and site-to-site. Turbulence in the air, even on an apparently clear night, can distort images. If an image appears fuzzy and ill-defined, back off to a lower power eyepiece for a more well-resolved image.

The power, or magnification of a telescope is determined by the focal length of the telescope and the focal length of the eyepiece being used. To calculate eyepiece power, divide the tele- scope's focal length by the eyepiece's focal length. For example, you may wish to use a 25mm eyepiece with the DS-2000 model DS-2114S. Look up the focal length of the DS-2114S under "Specifications: DS-2114S," page 33. The focal length is listed as 1000mm.

Telescope focal length divided by Eyepiece focal length = Eyepiece power

1000 25 = 40

The eyepiece power, or magnification is therefore 40X (approximately).

The Barlow Lens

Some Meade telescopes include a power multiplier called a Barlow lens. Consisting of a lens mounted in a 4"-long (10cm) tube, the Barlow doubles or triples the power obtained when an eyepiece is used alone. In the example above, a 25mm eyepiece results in 40X magnification with the DS-2114S telescope; when this same eyepiece is used in conjunction with a 2x Barlow lens, power is doubled to 80X. To use the Barlow, insert it into the diagonal prism (refractor models only) or eyepiece holder, followed by the eyepiece.

14

Page 13 Page 15
Page 14
Image 14
Meade DS-2000 instruction manual Choosing an Eyepiece, Barlow Lens
Page 13 Page 15

DS-2000 specifications

The Meade DS-2000 is a versatile and user-friendly telescope that caters to both beginners and seasoned astronomers alike. Known for its exceptional performance and ease of use, the DS-2000 series has become a popular choice among amateur stargazers. This telescope features a robust design coupled with advanced technologies that enhance the overall observing experience.

One of the standout features of the Meade DS-2000 is its sturdy mount, which provides stability during observations. This stability is crucial for clearer and more detailed views of celestial objects, as it minimizes vibrations and shakes that can occur while tracking objects across the night sky. The telescope typically comes with an adjustable aluminum tripod to further enhance stability and can handle varying weights and instruments.

The DS-2000 series utilizes an electronically controlled altazimuth mount, allowing users to easily navigate the sky with its automatic tracking capabilities. This intuitive design ensures that even novice astronomers can locate and follow astronomical objects with minimal effort. The built-in computer control allows users to access a database of thousands of celestial bodies, making it easy to select targets for viewing.

In terms of optics, the Meade DS-2000 features high-quality glass optics with multi-coated lenses. This ensures superior light transmission and contrast, resulting in bright, clear images of the Moon, planets, and deep-sky objects. The telescope typically offers a range of apertures, making it suitable for various observing preferences and conditions.

Furthermore, the Meade DS-2000 is often equipped with a 9mm or 25mm eyepiece, enabling users to achieve magnifications adequate for observing different types of celestial phenomena. The addition of a built-in red-dot finder makes it easier to aim and locate objects in the night sky.

Portability is another significant characteristic of the DS-2000 series. Its lightweight design allows astronomers to transport it easily to different observing locations, making spontaneous stargazing adventures possible, whether in the backyard or at a dark-sky site.

In summary, the Meade DS-2000 combines solid construction, user-friendly features, and advanced technology, making it an excellent choice for anyone interested in exploring the night sky. With its impressive optics, reliable tracking capabilities, and enhanced portability, the DS-2000 series provides an enjoyable and rewarding astronomical experience.
Top Page Image Contents