User manual BUSHNELL VOYAGER 78-9470

[. . . ] Remove Main Tube Locking Nuts (3) from screws extending from bottom of Telescope Main Tube (2). Insert extended screws into holes in cradle of Easy Track® Mounting System. 2 · Remove plastic insert on bottom side of finderscope to allow battery to make connection with battery contact for power. Look through main telescope tube at low power and establish a well-defined stationary target. [. . . ] 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 15 mm lens, the calculation would look like this: 750 mm ÷ 15mm = 50x or 50 power. ) 2. Barlow lenses are used to double or triple the power of your telescope. Note: The Penta Mirror Assembly when used in conjunction with the Barlow Lens and Eyepiece as shown in the Intended Configuration Diagram will yield an effective doubling power of the magnification already acheived with the Barlow and Eyepiece configuration alone. The magnification calculation would look like this: 750 mm ÷ 20mm = 38 power. 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 (13). 2. 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. Aligning Finderscope: Look through main telescope tube at low power and establish a well-defined stationary target. Looking through red dot finderscope, alternate tightening each adjustment wheel (at rear and left side of finderscope) until the red dot of finderscope is precisely aligned and centered on the same object being viewed in main telescope tube. Now, objects located first with the Finderscope (16) will be centered in the field of view of the main telescope. Never Look Directly At The Sun With Your Telescope Permanent Damage To Your Eyes May Occur Please find below an image depicting how to attach the red dot finderscope and an image depicting a fully-attached unit. How-To-Attach: Place Finderscope Cylindrical Groove over Cylindrical Finderscope Mount Post until it clicks into place. Plastic Insert Adjustment Wheels Aligning and Using Red Dot Finderscope Remove plastic insert on bottom side of finderscope to allow battery to make connection with battery contact for power. Look through main telescope tube at low power and establish a well-defined stationary target. Looking through red dot finderscope, alternate tightening each adjustment wheel (at rear and left side of finderscope) until the red dot of finderscope is precisely aligned and centered on the same object being viewed in main telescope tube. Enjoying Your New Telescope 1. This is an object sure to please any budding astronomer or experienced veteran. When you have developed proficiency at this level, other objects become good targets. The first thing you need to do after assembling the telescope as planned is center the desired object in the finderscope's cross hairs. Provided you did a reasonable job aligning the finderscope, a quick look through the main telescope tube at low power should reveal the same image. With the lowest power eyepiece (the one with the largest number printed on it) you should be able to focus the same image that you saw through the finderscope. The low power eyepiece will give you a wider field of view, and brighter image--thus making it very easy to find your target object. At this point with a focused image in both scopes, you've passed the first obstacle. If you don't see an image after attempting to focus it in, you might consider aligning your finderscope again. Once you pass this step, you'll enjoy the time spent ensuring a good alignment. Every object you center in the finderscope will be easily found in the main telescope tube, which is important for continuing your exploration of the night sky. The low power eyepieces are perfect for viewing the full moon, planets, star clusters, nebulae, and even constellations. [. . . ] The power of your telescope can be determined by dividing the focal length of the objective lens by the focal length of the eyepiece. (For example: 1000 ÷ 25 = 40X) The telescope focal length is the same focal length as the objective focal length. Telescope focal lengths range from 600mm to 910mm on Bushnell telescopes. Telescopes with power ranging from 25X to 50X can be used to view Star Clusters and Nebulae. [. . . ]