Power | Approximate Focal Length | Approximate | Approximate | |
| Or Telephoto Effect | Effective f/Stop | Shutter Speeds | |
15x | 1000mm | f/16 | 1/200 | 1/500 |
20x | 1400mm | f/22 | 1/125 | 1/200 |
25x | 1700mm | f/28 | 1/60 | 1/125 |
30x | 2000mm | f/32 | 1/60 | 1/125 |
40x | 2700mm | f/45 | 1/30 | 1/60 |
50x | 3400mm | f/56 | 1/15 | 1/30 |
60x | 4000mm | f/64 | 1/15 | 1/30 |
NOTE: Using any other f/stop other than f/16 may produce a dim image.
CAMERAS REQUIRING EXTERNAL METERING DEVISES Set the light meter’s ISO index to the rating of the film being used. Select the magnification and not f/stop as explained above. If, as in many cases the smallest f/stop shown on your light meter is f/45 and you need a reading for f/56 or f/64, refer to the Light Extension Scale or increase the ISO setting as previously explained.
REMINDER
After using the Discoverer as a telephoto lens, the Telephoto Adjustment Control must be turned all the way counter- clockwise to resume use as a spotting scope.
QUESTIONS & ANSWERS
Q:Can I use lens filters on my Discoverer?
A:Yes, any standard 67mm diameter threaded filter will screw on to the objective lens exactly as does the lens cap. In long range telephotography, ground haze can diffuse the light between the camera and the subject resulting in a hazy appearing picture, lacking in contrast
Q:Will heat affect the image?
A:Yes, warm temperature conditions can cause the image to quiver or “dance”resulting in a blurred effect. This is not due to a defective scope, but rather the effects of heat mirage.
Q:Can I take pictures of the moon?
A:Yes, since the moon is illuminated by the sun, you can use the exposures shown in the instructions under “How To Determine Shutter Speed.” It is important to realize that exposure time increases as the moon wanes, with 10 times normal exposure necessary in its crescent stage.
Q:Is the Discoverer waterproof?
A:No, it is “shower tight”. If the scope has been exposed to moisture of any kind, wipe it dry as soon as possible.
CAUTION: Do no attempt to disassemble or repair any part of the Discoverer yourself. In doing so, you will invalidate your warranty. Special apparatus and considerable skill and experience is required to make even the simplest internal adjustment.
ACCESSORIES
Bushnell offers numerous types of accessories, tripods and a car window mount to enhance your enjoyment of the Discoverer Spotting Scope. For more information, visit our website at www.bushnell.com
Telephoto Accessories
WARRANTY / REPAIR
LIFETIME LIMITED WARRANTY
Your Bausch & Lomb® spotting scope 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. 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 $10.00 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: | IN CANADA Send To: |
Bushnell Performance Optics | Bushnell Performance Optics |
8500 Marshall Drive | 25A East Pearce Street, Unit 1 |
Lenexa, Kansas 66214 | 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.
Bausch & Lomb® is a registered trademark of and used under license from
Bausch & Lomb Incorporated.
©2001 Bushnell Performance Optics
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