User manual ORION TELESCOPES & BINOCULARS SHORTTUBE 80

[. . . ] INSTRUCTION MANUAL Orion® ShortTubeTM 80 80mm Rich-Field Refracting Telescope #9386 Customer Support (800) 676-1343 E-mail: support@telescope. com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 P. O. -Your Orion ShortTube 80 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. [. . . ] The finder scope's focus should not need to be adjusted again. eyepiece inserted and secured in the diagonal, simply point the telescope at the subject you want to observe and center it on crosshairs of the finder scope (which you've previously aligned with the telescope, as explained in the preceding section). Then look into the eyepiece of the main telescope and the subject should be in the center of the field of view. If the view is blurry, adjust the focus with the focus wheel until the image appears sharp. For higher magnification, switch to the 10mm eyepiece and readjust the focus as necessary. Remember, increasing the magnification decreases the field of view and the image brightness. Additional eyepieces can be purchased to obtain a greater range of magnifications. Astronomical Viewing The ShortTube 80 excels for astronomical observation. Its unobstructed 80mm aperture and short 400mm focal length (f/5) provide bright, expansive views of star fields and celestial objects residing within our solar system and beyond. The ShortTube 80 can show much more than what is visible on Earth during the day. Once the Sun sets, there are literally thousands of objects in the night sky that can be inspected more closely. For astronomical usage, we recommend a 90° star diagonal instead of the 45° correct-image diagonal that comes with the telescope. The correct-image diagonal is designed for daytime use, and will cause some degradation of image quality when used for astronomy. Also, the viewing angle provided by a 90° star diagonal is more comfortable for looking up. When using a star diagonal, the image in the eyepiece will appear backwards (inverted left-to-right). For casual stargazing, an altazimuth mount mount will do the job just fine. But an equatorial mount, is designed to make it easier to manually "track" the motion of celestial objects with just one slow-motion cable. Furthermore, with an equatorial mount you can add an optional motor drive to track the stars automatically--a great convenience. When selecting a location for nighttime stargazing, make it as far away from city lights as possible. Light-polluted skies greatly reduce what can be seen with the telescope. Also, give your eyes at least 20 minutes to dark-adapt to the night sky. Use a red flashlight to see what you're doing at the telescope, or to read star charts. 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. [. . . ] For closer-range (less than 1/4-mile) terrestrial photography, you need both a T-ring for your camera and a T-adapter (#5264), which provides the extra focus travel needed. Remove the nosepiece from the camera adapter; the body of the adapter will not be needed here. Connect the T-ring to your camera body (remove any camera lenses first), and connect the nosepiece of the camera adapter to the T-ring. Now, insert the entire assembly into the focuser's drawtube (remove the eyepiece and diagonal), and secure with the thumbscrew on the drawtube. [. . . ]