User manual ORION TELESCOPES & BINOCULARS 09069

[. . . ] INSTRUCTION MANUAL Orion ShortTube 90 ® TM 90mm Rich-Field Refracting Telescope #9069 Welcome to a new world of adventure!Your Orion ShortTube 90 is a fine-quality instrument designed for both daytime terrestrial viewing and nighttime stargazing. Compact, portable, and easy to use, this versatile scope will provide many hours of enjoyment for the whole family. These instructions will help you set up and properly use and care for your telescope. Please read them over thoroughly before getting started. Finder scope alignment screws Finder scope Finder scope bracket Focus lock setscrew Eyepiece 1/4"-20 mounting block 90° star diagonal Focus wheel The ShortTube 90mm Refractor Parts List Dew/glare shield WARNING: Never look at the sun with your telescope (or even with just your eyes) without a professionally made solar filter. [. . . ] Red light will not spoil your dark-adapted night vision as readily as white light will. To find celestial objects with your telescope, you first need to become reasonably familiar with the night sky. Unless you know how to recognize the constellation Orion, for instance, you won't have much luck locating the Orion Nebula. A simple planisphere, or star wheel, can be a valuable tool for learning the constellations and seeing which ones are visible in the sky on a given night. A good star chart or atlas, like the Orion DeepMap 600, can come in handy for helping locate interesting objects among the dizzying multitude of stars overhead. Except for the Moon and the brighter planets, it is pretty time-consuming and frustrating to hunt for objects randomly, without knowing where to look. It is best to have specific targets in mind before you begin looking through the eyepiece. The Moon The Moon, with its rocky, cratered surface, is one of the easiest and most interesting subjects to observe with your telescope. The myriad craters, rilles, and jagged mountain formations offer endless fascination. The best time to observe the Moon is during a partial phase, that 2 is, when the Moon is not full. During partial phases, shadows cast by crater walls and mountain peaks along the border between the dark and light portions of the lunar disk highlight the surface relief. A full Moon is too bright and devoid of surface shadows to yield a pleasing view. Try using a Moon filter to dim the Moon when it is too bright; it simply threads onto the bottom of the eyepiece. The Planets The planets don't stay put like stars do (planets don't have fixed R. A. coordinates), so you will have to refer to charts published monthly on our website, www. telescope. com, or in Astronomy, Sky & Telescope, or other astronomy references to locate them. Venus, Mars, Jupiter, and Saturn are the brightest objects in the sky after the Sun and the Moon. All four of these planets are not normally visible in the sky at one time, but chances are one or two of them will be. You can see the disk of the giant planet and watch the ever-changing positions of its four largest moons, Io, Callisto, Europa, and Ganymede. If atmospheric conditions are good, you may be able to resolve thin cloud bands on the planet's disk. SATURN The ringed planet is a breathtaking sight when it is well positioned. The tilt angle of the rings varies over a period of many years; sometimes they are seen edge-on, while at other times they are broadside and look like giant "ears" on each side of Saturn's disk. A steady atmosphere (good seeing) is necessary for a good view. You may probably see a tiny, bright "star" close by; that's Saturn's brightest moon, Titan. [. . . ] Specifications Objective lens: 90mm aperture, achromatic air-spaced doublet, fully antireflection coated Focal length: 500mm Focal ratio: f/5. 6 Weight of optical tube assembly: 5 lbs. Mounting provision: 1/4"-20 threaded mounting block Finder scope: 6x magnification, 30mm aperture, achromatic, crosshairs Eyepiece: 26mm (19x) Plössl, 1. 25" barrel diameter, fully coated Diagonal: 90° star diagonal, mirror-type, 1. 25" barrel diameter Suggested Accessories Full descriptions of the following accessories are available in the Orion print catalog or online catalog (www. telescope. com). · · · · · · · · · Paragon HD-F2 Tripod (#5370): Portable yet sturdy camera tripod. AZ-3 Altazimuth Mount (#9018): Telescope mount with dual slowmotion controls. [. . . ]