Bushnell Telescope 78 9512 User Manual

DEEP SPACE SERIES  
420 x 60 Refractor Telescope  
Model 78-9512  
16  
15  
14  
13  
12  
17  
1
2
3
4
11  
10  
5
9
7
8
6
1. 60mm Objective Lens  
2. Telescope Main Tube  
3. Altazimuth Yoke Mount  
4. Azimuth Lock Knob  
5. Tripod Legs  
9. Tripod Leg - Lock Screws  
10. Rack & Pinion Focus Mechanism  
11. Diagonal Mirror  
12. Eyepiece  
13. Finderscope Mount  
6. Tripod Leg Middle Section 14. Finderscope Focus Adjustment  
(
7. Accessory Tray Brace  
8. Accessory Tray  
15. Finderscope Adjustment Screws  
16. Finderscope  
17. Altitude Lock Knobs  
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HOW TO USE YOUR NEW TELESCOPE  
Astronomical telescopes are designed such that the image you see will appear UPSIDE DOWN and REVERSED, this  
is acceptable for viewing celestial bodies. For land-based viewing an “Erecting Lens” is used to properly re-orient the  
image.  
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 lens,  
which for this model is 700 mm. A formula can be used to determine the power of each eyepiece lenses:  
telescope OBJECTIVE lens focal length EYEPIECE focal length = MAGNIFICATION (e.g. Using the  
20 mm lens, the calculation would look like this: 700 mm ¸ 20mm = 35x or 35 power.)  
2. 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 105 power. (35 x 3 = 105x or 105 power)  
3. Also included with this telescope is an Erecting lens. An Erecting lens is used to view land-based object  
where the correct image orientation is important. The Erecting lens re-orients the telescope image so  
that the image you see is properly oriented. Place your Erecting lens between the focusing tube and the  
eyepiece (fig. 3). It is not recommended to use the Diagonal Mirror (11) with the Erecting lens. The Diagonal  
Mirror will make the erected image appear to be “flipped” depending on the orientation of the diagonal  
mirror- relative to the telescope.  
Erecting Lens or Barlow Lens  
12  
10  
fig. 3  
Focusing Telescope:  
1. After selecting the desired  
eyepiece, aim Main Telescope  
Tube (2) at a land-based target at least 200 yards away (e.g. A telephone pole or building). Fully extend  
focusing tube by turning Rack and Pinion Focusing Mechanism. (10)  
2. While looking through selected eyepiece (in this case the 20 mm), slowly retract focusing tube by turning  
Rack and Pinion Focusing Mechanism (10) until object comes into focus.  
Aligning Finderscope:  
1. Look through Main Telescope Tube (2) and establish a well-defined target. (see focusing telescope section)  
Tighten the Altitude Lock Knob (17) and Azimuth Lock Screw (4) so that telescope’s aim is not disturbed.  
Looking through Finderscope (16), alternate tightening each Finderscope Adjustment Screw (15) until crosshairs  
of Finderscope are precisely centered on the same object already centered in main telescope tube's field  
of view.  
2. 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 Result.  
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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 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  
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