Pair of collimating screws (3)

Figure 16. The lens cell of the SkyView Pro 120. There are three pairs of collimating screws; each pair of screws work together to adjust the tilt of the lens.

outdoors, although storage in a garage or shed is OK. Small components like eyepieces and other accessories should be kept in a protective box or storage case. Keep the dust cover on the front of the telescope when not in use.

Your SkyView Pro 120 EQ requires very little mechanical maintenance. The optical tube is aluminum and has a smooth painted finish that is fairly scratch-resistant. If a scratch does appear on the tube, it will not harm the telescope. Smudges on the tube can be wiped off with a soft cloth and a household cleaner such as Windex or Formula 409.

Cleaning Lenses

Any quality optical lens cleaning tissue and optical lens clean- ing fluid specifically designed for multi-coated optics can be used to clean the exposed lenses of your telescope’s objec- tive lens, eyepieces or finder scope. Never use regular glass cleaner or cleaning fluid designed for eyeglasses. Before cleaning with fluid and tissue, however, blow any loose par- ticles off the lens with a blower bulb or compressed air. Then apply some cleaning fluid to a tissue, never directly on the optics. Wipe the lens gently in a circular motion, then remove any excess fluid with a fresh lens tissue. Oily fingerprints and smudges may be removed using this method. Use caution; rubbing too hard may scratch the lens. For the objective lens, clean only a small area at a time, using a fresh lens tissue on each area. Never reuse tissues.

11. Specifications

Objective lens: Achromatic doublet, air-spaced

Objective lens coating: Multi-coated

Objective lens diameter: 120mm (4.7")

Focal length: 1000mm

Focal ratio: f/8.3

Eyepieces: 25mm and 10mm Sirius Plössls, fully coated, 1.25"

Magnification: 40x (with 25mm) and 100x (with 10mm)

Finder Scope: 8x40 Achromatic, 5.33° field of view

Focuser: Rack and4pinion, accepts 1.25" or 2" accessories and camera T-Ring

Diagonal: 90° Star diagonal, mirror type, 1.25"

Mount: SkyView Pro, German equatorial

Tripod: Steel

Tripod support tray: Aluminum, provides additional stability, holds five 1.25" eyepiece and two 2" eyepieces

Weight: 41 lbs. (Mount 30 lbs., optical tube 11 lbs.)

Polar axis latitude adjustment: 8° to 70°

Polar axis finder: Optional

Motor Drives: Optional

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Orion PRO 120 EQ instruction manual Specifications, Cleaning Lenses
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PRO 120 EQ specifications

The Orion PRO 120 EQ is a remarkable telescope designed for both amateur astronomers and seasoned enthusiasts. This telescope offers a perfect balance of performance, features, and affordability, making it an excellent choice for those looking to explore the wonders of the night sky.

One of the standout features of the Orion PRO 120 EQ is its 120mm aperture. This generous opening allows for an impressive amount of light to enter the telescope, enabling users to observe faint celestial objects with clarity. Whether observing craters on the Moon or distant galaxies, the optics deliver bright and sharp images. The focal length of 1000mm gives a versatile range for planetary and deep-sky observations, ensuring that users can explore various astronomical phenomena.

The telescope comes equipped with a sturdy equatorial mount, providing smooth and accurate tracking of celestial objects. This mount is essential for long exposure astrophotography as it allows for precise movements to follow objects as they traverse the night sky. The mount also features slow-motion controls, making it easy for users to make fine adjustments and focus on their targets.

The Orion PRO 120 EQ is designed with user-friendliness in mind. It includes a 1.25-inch focus mechanism compatible with various eyepieces and accessories, allowing for customization to enhance the observing experience. The telescope's optical design features fully multi-coated optics, which help to increase light transmission and reduce glare, ensuring vibrant images with high contrast.

Durability is another key characteristic of the Orion PRO 120 EQ. Its robust construction ensures stability during observations, and the compact size makes it relatively easy to transport, whether setting up in the backyard or heading to a dark-sky site. The telescope comes with a set of sturdy accessories, including a finderscope and a set of quality eyepieces, further enhancing its usability right out of the box.

Overall, the Orion PRO 120 EQ is a versatile telescope that excels in both beginner and advanced applications. Its combination of a large aperture, quality optics, and reliable mount makes it a fantastic choice for anyone looking to delve into the vast universe, making every stargazing session a memorable experience.
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