Summary of the content on the page No. 1
®
VOYAGER 8 INCH DOBSONIAN TELESCOPE
MODEL 78-8000
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1. Rack & Pinion focusing System 6. Carry Handle
2. Reflector Body 7. Primary Mirror
3. Altitude Bearing 8. Finderscope
4. Dobsonian Side Panel
9. 1.25" Format Eyepiec
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5. Dobsonian Base (Azimuth Bearing)
Never Look Directly At The Sun With Your Telescope
Permanent Damage To Your Eyes May Occur
Summary of the content on the page No. 2
Thank you for purchasing the Bushnell Voyager Dobsonian Telescope! Your new telescope has been designed and crafted with the highest standards so that you may have years of enjoyment and use out of this wonderful window to the heavens. This product comes complete with everything you'll need to explore your universe including a professional parabolic primary mirror, precision rack and pinion focusing mechanism, superior all-metal main telescope tube, and professional quality wide-field 6x30 fin
Summary of the content on the page No. 3
7. Locate the circular component with the five drilled holes. This component is called the azimuth bearing plate. Identify the side with the four outer countersunk holes like on the other components. The side with the holes countersunk is the underside. 8. Insert the remaining four screws through the azimuth bearing plate from the underside into the corresponding pre-drilled holes in the bottom edges of the side panels on the previously assembled "box" as shown in the diagram. 9. Take the as
Summary of the content on the page No. 4
TELESCOPE USE SELECTING AN EYEPIECE: 1. You should always start viewing with the lowest power eyepiece, which in this case is the 25 mm lens. Note: the base power of each eyepiece is determined by the focal length of the telescope objective element, which for this model is 1000 mm. A formula can be used to determine the power of each eyepiece: telescope OBJECTIVE mirror focal length EYEPIECE focal length = MAGNIFICATION (e.g. Using the 25 mm lens, the calculation would look like this: 1200 m
Summary of the content on the page No. 5
4. If the image of your eye is centered in the reflection of the secondary mirror, your secondary mirror is collimated. If it is off to one side, then secondary mirror adjustment will be required. By removing the plastic cap on the secondary mirror base at the end of the telescope tube nearest the Rack and Pinion Focusing Mechanism (1), you will see three screw heads. They are positioned 120 degrees apart. By adjusting these three screws very slowly and carefully, the secondary mirror will r
Summary of the content on the page No. 6
4. The recurring astronomical theater we call the night sky is an ever-changing billboard. In other words, not the same movie plays all the time. Rather, the positions of the stars change not only hourly as they seem to rise and set, but also throughout the year. As the earth orbits the sun our perspective on the stars changes on a yearly cycle about that orbit. The reason the sky seems to move daily just as the sun and the moon "move" across our sky, is that the earth is rotating about its
Summary of the content on the page No. 7
Mars--The Great Red Planet appears as a reddish-orange disk. Look at different times of the year and try to catch a glimpse of the white polar ice caps. Venus--just like the moon, Venus changed phases from month to month. Some views of brilliant Venus appear as if you were looking at a distant crescent moon. Nebulae--The Great Orion Nebula is a very well known night sky object. This and many others are brought to you by this telescope. Star Clusters--View millions of stars densely packed in a
Summary of the content on the page No. 8
TROUBLESHOOTING GUIDE If after you have set-up your new telescope you are unable to see any objects, use this Quick Reference guide to help you to understand the cause of the problem and quickly determine a remedy 1. I’ve completed the set-up yet I cannot see anything • Check to see if objective lens cover and all other lens covers have been removed. • Try to view an object that is 200 or more yards away. • If there is more than one eyepiece included with the telescope, use the lowest powe
Summary of the content on the page No. 9
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. If your telescope contains electrical components the electronic components are warranted to be free of defects in materials and workmanship for one year after th
