User manual BUSHNELL DEEP SPACE 78-9519

[. . . ] Remove the two nuts located near the back of the Telescope Main Tube (2) and place the Finderscope and Mount assembly over the exposed screws. Replace the nuts, and securely tighten the Finderscope Mount in place. Attach Telescope Main Tube · Locate the Telescope Main Tube (2). Remove the wingnuts that are attached to the long screws protruding from beneath the telescope. [. . . ] It can be set to allow manual controls to track the movements of celestial bodies across the sky. This is referred to as diurnal movement; movement of celestial bodies in the direction opposite to that of the earth's rotation and is around the earth's axis. By aligning the telescope's polar axis at celestial North, you will place the telescope in parallel with the earth's axis and thus be able to locate stars in the sky based on star atlas information. To compensate for your position on earth, the polar axis is set in one of three ways: · Set up the telescope at night. Loosen the Declination Lock Knob (3) and rotate the telescope around the declination axis until the arrow on the declination scale points to 90 degrees. Loosen the Azimuth Lock Knob (8) and turn the telescope until the objective end faces due north. This can be done by approximating the location of the pole star (Polaris or North Star) or by the use of a compass. True North is then found by directing the telescope at Polaris, as magnetic North is slightly away from true North. Loosen the Altitude Lock Knob (7) and set the latitude scale to the correct latitude for your area. You will probably notice that Polaris is not dead center in the finderscope's field of view. This is probably because your telescope is not absolutely level with the ground. Loosen the Azimuth Lock Knob (8) again and turn the telescope so that it is directly aimed at Polaris. Therefore, the sighting of stars will have to be slightly adjusted as you locate them in the heavens. · · HOW TO USE YOUR NEW TELESCOPE Astronomical telescopes are designed in such a way that the image you will see appear will be UPSIDE DOWN and REVERSED, this is acceptable for viewing celestial bodies. For land-based viewing an "Erector Lens" is used to properly re-orient the image. Selecting an Eyepiece: 1. You should always start viewing with the lowest power eyepiece, which in this case is the 20 mm lens. Note: the base power of each eyepiece is determined by the focal length of the telescope objective lens, which for this model is 900 mm. A formula can be used to determine the power of each eyepiece: telescope OBJECTIVE lens focal length EYEPIECE focal length = MAGNIFICATION (e. g. Using the 20 mm lens, the calculation would look like this: 900 mm ÷ 20mm = 45x or 45 power. ) 2. [. . . ] (see focusing telescope section) Tighten the Altitude Lock Knob (7) and Azimuth Lock Knob (8) so that telescope's aim is not disturbed. Looking through Finderscope (20), alternate tightening each Finderscope Adjustment Screw (19) until crosshairs of Finderscope are precisely centered on the same object already centered in main telescope tube's field of view. Now, objects located first with the Finderscope (20) will be centered in the field of view of the main telescope. 3. Never Look Directly At The Sun With Your Telescope Permanent Damage To Your Eyes May Occur Telescope LIFETIME LIMITED WARRANTY Your telescope is warranted to be free of defects in materials and workmanship for the lifetime of the original owner. The Lifetime Limited Warranty is an expression of our confidence in the materials and mechanical workmanship of our products and is your assurance of a lifetime of dependable service. [. . . ]