Bresser 9621502, Operating Instructions Manual

10

Earth Observation

When viewing terrestrial objects, look through the heat waves that form over 

the Earth's surface. You may have seen these heat waves shimmering across the 

asphalt in the summer. Heat waves cause a loss of image quality.

If heat waves are affecting their vision, try focusing out a bit to get a smoother, 

better quality image. Use the early morning hours for your observations, before 

the earth's surface has heated up too much.

Cleaning and maintenance

Your spotting scope is a precision optical instrument built to provide a lifetime 

of observing experience. (It will rarely, if ever, require repair or maintenance by 

the manufacturer.) Follow this guideline to keep your spotting scope in the best 

condition:

 › Avoid cleaning the lenses of the spotting scope. A little dust on the surface of 

the corrective lens will not result in any loss of image quality.

 › If absolutely necessary, dust should be removed from the front lens very 

carefully with a camel hair brush or blown away with an ear syringe (available 

at most pharmacies).

 › Fingerprints and organic materials on the front lens can be removed with a 

solution of 3 parts distilled water and 1 part isopropyl alcohol. You can also 

add 1 drop of biodegradable dishwashing liquid per half liter of solution. Use 

soft, white face wipes and make short, gentle movements. Change the wipes 

frequently.

ATTENTION: Do not use perfumed cloths or cloths with lotions. 

These could damage the optics.

 ›

Your spotting scope is rainwater protected:

 This means that it is suitable 

to be used by a sportsman, a sailor or an occasional user in an environment 

where the spotting scope may be exposed to water, e.g. rain, fog, spray, etc. It 

is designed to be resistant if accidentally exposed to water, but it is not suitable 

for diving or extensive use in water. If your spotting scope is intentionally 

submerged in water for a long period of time, you risk voiding your warranty.

  Also note that although your spotting scope can be used near water, water on the 

lens will cause distortion of the images. Wipe the water off the entire unit with a 

soft cloth when you move away from the water again.