User manual BUSHNELL 78-9500

[. . . ] Saturn--Even at the lowest power you should be able to see Saturn's rings and moons. This is one of the most satisfying objects in the sky to see simply because it looks like it does in pictures. Imagine seeing what you've seen in textbooks or NASA images from your backyard!Jupiter--The largest planet in our solar system is spectacular. [. . . ] Note: the base power of each eyepiece is determined by the focal length of the telescope objective lens. A formula can be used to determine the power of each eyepiece: telescope OBJECTIVE lens focal length divided by EYEPIECE focal length = MAGNIFICATION (e. g. Using the 20 mm lens, a sample calculation would look like this: 700 mm / 20mm = 35x or 35 power. Telescope models will vary in focal length). Included with this telescope is a Barlow lens. Barlow lenses are used to double or triple the power of your telescope. Place your Barlow between the focusing tube and the eyepiece. Using the example above, your 3x Barlow lens would give you a total power of 105x or 135 power. The magnification calculation would look like this: 700 mm/ 20mm =35 power. 35 power x 3 = 105 power. 2. Focusing Telescope 1. After selecting the desired eyepiece, aim main telescope tube at a land-based target at least 200 yards away (e. g. Fully extend focusing tube by turning Rack and Pinion Focusing Mechanism. While looking through selected eyepiece (in this case the 20 mm), slowly retract focusing tube by turning Rack and Pinion Focusing Mechanism until object comes into focus. 2. Look through Main Telescope Tube and establish a well-defined target. (see Focusing Telescope section) Looking through Wide Field Finderscope, alternate tightening each Finderscope Adjustment Screw until the red dot of Wide Field Finderscope are precisely centered on the same object already centered in Main Telescope Tube's field of view. Now, objects located first with the Wide Field Finderscope will be centered in the field of view of the main telescope. 2. 3. Never Look Directly At The Sun With Your Telescope Permanent Damage To Your Eyes May Occur 7. HOW TO USE YOUR NEW TELESCOPE (CONTINUED) Understanding the Equatorial Mount The Equatorial Mount is designed to move in any direction. 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 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. Loosen the Declination Lock Knob and rotate the telescope around the declination axis until the arrow on the declination scale points to 90 degrees. Look up the latitude of your area in any geographical atlas. Loosen the Latitude Lock Knob and set the latitude scale to the correct latitude for your area. [. . . ] This will provide a more stable foundation for viewing, especially if you've drawn a crowd with your new telescope. If possible view from a location that has relatively few lights. This will allow you to see much fainter objects. You'd be surprised how much more you'll see from your local lake or park when compared to a backyard in the city. [. . . ]