Instruction d'utilisation Bushnell VOYAGER 78-4500

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®
VOYAGER 4.5 INCH DOBSONIAN TELESCOPE
MODEL 78-4500
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1. Rack & Pinion Focusing System 5. Dobsonian Base (Azimuth Bearing)
2. Reflector Body 6. Primary Mirror
3. Altitude Bearing 7. Finderscope
4. Dobsonian Side Panel 8. 1.25” Format Eyepiece
Never Look Directly At The Sun With Your Telescope
Permanent Damage To Your Eyes May Occur

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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 primary mirror, precision rack and pinion focusing mechanism, superior all-metal main telescope tube, and professional quality wide-field 5x24mm finderscope

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TELESCOPE USE 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 element, which for this model is 900 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 20 mm lens, the calculation would look like this: 900 mm

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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 will 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. 3. The low power eyepieces are perfect for viewing the

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Where do I start? Your Bushnell telescope can bring the wonders of the universe to your eye. While this manual is intended to assist you in the set-up and basic use of this instrument, it does not cover everything you might like to know about astronomy. The first thing you need to do is get a very simple star chart and a flashlight with a red bulb or red cellophane over the end. For objects other than stars and constellations, a basic guide to astronomy is a must. Some recommended sources ap

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length is the number printed on the eyepiece. (For example: 900 ÷ 20 = 45X) 3. Where do I find the Telescope Focal Length • The telescope focal length is the same focal length as the objective focal length. For this telescope it is 900mm. Telescope focal lengths range from 600mm to 1200mm on Bausch & Lomb and Bushnell telescopes. 4. What can I see with my telescope ? • Telescopes with power ranging from 25X to 50X can be used to view Star Clusters and Nebulae. 90X to 120X telescope can view gal

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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