Bushnell Telescope 78 2010 User Manual

VOYAGER® 4.5 INCH FAMILY TELESCOPE  
MODEL 78-2010  
Never Look Directly At The Sun With Your Telescope  
Permanent Damage To Your Eyes May Occur  
 
SHOULDER STRAP ATTACHMENT (IF DESIRED)  
1. Remove the Adjustable Shoulder Strap (8) (not shown) from the carton.  
2. Attach one end of the Adjustable Shoulder Strap (8) to the Forward Clips (6) on the side of  
the Telescope Body (2).  
3. Attach the other end of the Adjustable Shoulder Strap (8) to either the other Forward Clip (6)  
or the Rear Clip (7), whichever provides the most comfortable position. Adjust the Shoulder  
Strap (8) and enjoy.  
TELESCOPE USE  
SELECTING AN EYEPIECE:  
1. You should always start viewing with the lowest power eyepiece, which in this case is the 31  
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 500 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 31 mm lens, the calculation  
would look like this: 500 mm ¸ 31mm = 16x or 16 power.) In addition, the 5mm eyepiece  
will provide a magnification of 100x or 100 power.  
2. Offered as an accessory for this telescope is a Barlow lens (model #78-0105). Barlow lenses  
are used to double or triple the power of your telescope by placing your Barlow between the  
focusing tube and the eyepiece. Using the example above, a 2x Barlow lens would give you a  
total power of 32x or 32 power. (16 x 2 = 32x or 32 power). The 2x Barlow Lens (model #78-  
0105) would provide a 200x or 200 power magnification when used in conjunction with the  
5mm eyepiece. Other accessories available include a 9mm eyepiece (model #78-0101) that  
would give you 56x or 56 power and a standard camera adapter (model #78-0104) for  
photographing the night sky.  
FOCUSING TELESCOPE:  
1. After inserting the eyepiece, aim the main telescope tube at a land-based target at least 200  
yards away (e.g. A telephone pole or building). Fully extend focusing tube by turning Rack &  
Pinion Focusing Mechanism (4)  
2. While looking through selected eyepiece (in this case the 31 mm), slowly retract focusing  
tube by turning Rack & Pinion Focusing Mechanism (4) until object comes into focus.  
COLLIMATING THE SECONDARY MIRROR  
Good alignment or collimation of the telescope's optical components will guarantee the most  
optimum viewing. This telescope body comes preassembled from the factory and  
precollimated. Therefore collimation should not be required. However, due to its great  
importance there are a few steps that you can take to ensure that your telescope is properly  
collimated.  
1. Remove the 1.25" Format Eyepiece (1) from the Rack and Pinion Focusing Mechanism (4).  
2. Look into the Rack and Pinion Focusing Mechanism (4) with the eyepiece removed. You will  
see the Secondary Mirror (5) located a few inches inside the end of the telescope tube nearest  
the Rack and Pinion Focusing Mechanism (4). Since it is a mirror, you will see a reflection of  
the large primary mirror. That mirror will show an image of the Secondary Mirror (5) and  
your eye. Each image will be centered in a concentric set of images starting with the image of  
the primary mirror, the Secondary Mirror (5), and your eye.  
3. Please refer to the diagram to see what to expect.  
 
Secondary Mirror Collimated  
Secondary Mirror (Out of Alignment)  
4. If the image of your eye is centered in the reflection of the Secondary Mirror (5), your  
Secondary Mirror (5) is collimated. If it is off to one side, then secondary mirror adjustment  
will be required. You will see three screw heads on the Secondary Mirror (5). They are  
positioned 120 degrees apart. By adjusting these three screws very slowly and carefully, the  
Secondary Mirror (5) will reflect an image of your eye that is perfectly centered in the  
reflection of the Secondary Mirror (5). Once this is accomplished, your Secondary Mirror (5)  
is now collimated.  
5. Your telescope is now ready to deliver the best images possible.  
Enjoying Your New Telescope  
1. First determine your targeted object. Any bright object in the night sky is a good starting  
point. One of the favorite starting points in astronomy is the moon. 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. Saturn, Mars, Jupiter, and Venus  
are good second steps to take.  
2. Avoid the temptation to move directly to the highest power. 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, you've passed the first obstacle. Once you  
pass this step, you'll will enjoy the time spent with your telescope. Every celestial object you  
center in the telescope will be easily focused, which is important for continuing your  
exploration of the night sky.  
3. The low power eyepieces are perfect for viewing the full moon, planets, star clusters,  
nebulae, and even constellations. These should build your foundation. However, for more  
detail, try bumping up in magnification to higher power eyepieces on some of these objects.  
During calm and crisp nights, the light/dark separation line on the moon (called the  
"Terminator") is marvelous at high power. You can see mountains, ridges and craters jump  
out at you due to the highlights. Similarly, you can move up to higher magnifications on  
the planets and nebulae. Star clusters and stars are best viewed through the low power no  
matter what.  
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 axis. As a result you may notice that after a few minutes or a few  
seconds depending on what power you are viewing at, the objects in your telescope will  
move. At higher magnifications especially, you will notice that the moon or Jupiter will  
"race" right out of the field of view. To compensate, just move your telescope to "track" it in  
the necessary path.  
 
Helpful Hints  
1. Your telescope is a very sensitive instrument. For best results and fewer vibrations set your  
telescope up on a level location on the ground rather than your concrete driveway or your  
wooden deck. This will provide a more stable foundation for viewing, especially if you've  
drawn a crowd with your new telescope.  
2. 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.  
3. Using your telescope out a window is NEVER recommended.  
4. View objects that are high in the sky if possible. Waiting until the object rises well above the  
horizon will provide a brighter and crisper image. Objects on the horizon are viewed  
through several layers of earth's atmosphere. Ever wonder why the moon appears orange as  
it sets on the horizon. It's because you are looking through a considerable more amount of  
atmosphere than you would directly overhead. (Note: If objects high in the sky are distorted  
or wavy, you are probably viewing on a very humid night.) During nights of unstable  
atmosphere, viewing through a telescope can be frustrating if not impossible. Astronomers  
refer to crisp, clear nights as nights of "good seeing."  
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 appear on  
our website at www.bushnell.com. Also on our website will be current events in the sky for  
suggested viewing. But, some of the standbys that you can see are:  
The Moon--a wonderful view of our lunar neighbor can be enjoyed with any magnification. Try  
viewing at different phases of the moon. Lunar highlands, lunar maria (lowlands called "seas"  
for their dark coloration), craters, ridges and mountains will astound you.  
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. Most noted features are its dark  
stripes or bands both above and below its equator. These are the north and south equatorial  
belts. Also interesting are Jupiter's four major moons. Pay close attention to their positions from  
night to night. They appear to be lined up on either side of Jupiter.  
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 changes 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 cluster that resembles a ball.  
Galaxies--One of the greatest and most interesting galaxies is our neighbor the Andromeda  
Galaxy. Enjoy this and many others.  
 
For further questions or additional information please contact:  
Bushnell Sports Optics Worldwide  
8500 Marshall Drive  
Lenexa, KS 66214  
ANSWERS TO COMMONLY ASKED QUESTIONS  
1. The image I see in the telescope is upside down and  
·
An upside-down and reversed image is a  
reversed from right to left ?  
common characteristic of most astronomical  
telescopes. Since telescopes are used for  
astronomical viewing orientation is not important.  
2. How do I determine the power my telescope ?  
·
The power of your telescope can be determine  
by dividing the focal length of the objective lens by  
the focal length of the eyepiece. The eyepiece focal  
length is the number printed on the eyepiece. (For  
example: 500 ¸ 5 = 100X)  
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 500mm. Telescope focal lengths  
range from 500mm to 1200mm on Bausch & Lomb  
and Bushnell telescopes.  
4. What can I see with my telescope ?  
·
Telescopes with power ranging from 16X to  
50X can be used to view Star Clusters and Nebulae.  
90X to 120X telescope can view galaxies. Most  
planets can be seen at any magnification.  
5. What do the numbers on the eyepiece mean ?  
·
The numbers on the eyepiece represents the  
“Focal Length” of the eyepiece.  
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 has 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 power  
(highest number) eyepiece to begin viewing.  
Use the Rack & Pinion Focusing Mechanism to  
bring the object you are trying to view into  
focus  
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 the date of purchase.  
In the event of a defect under this warranty, we will, at our option, repair or replace the  
product, provided that you return the product postage prepaid. This warranty does not  
cover damages caused by misuse or improper handling, installation or maintenance of the  
product.  
Any return made under this warranty must be accompanied by the items listed below:  
1) A check in the amount of $15.00 to cover the cost of handling  
2) Name and address for product return  
3) An explanation of the defect  
4) Product should be well packed in a sturdy outside shipping carton to prevent  
damage in transit and return postage prepaid to the address listed below:  
IN U.S.A. Send To:  
Bushnell * 8500 Marshall Drive * Lenexa, Kansas 66214  
IN CANADA Send To:  
Bushnell * 25A East Pearce Street, Unit 1 * Richmond Hill, Ontario L4B 2M9  
 
For products purchased outside the United States and Canada please contact your local  
dealer for applicable warranty information. This warranty gives you specific legal rights.  
You may have other rights which vary from country to country.  
©2001 Bushnell Performance Optics  
 

Black Decker Saw KS629 638SE User Manual
Black Decker Toaster T 20 Series User Manual
Bolens Lawn Mower BL110 User Manual
Bosch Appliances Security Camera NBN 733 User Manual
Bosch Appliances Smoke Alarm F220 B6 User Manual
Bosch Power Tools Power Hammer 611318739 User Manual
Bushnell GPS Receiver 360300 User Manual
Canon Photo Printer MP800R User Manual
Cateye Bicycle Accessories HL EL700RC User Manual
Chariot Carriers Stroller Captain XL User Manual