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  Promotion telescope to teach you how to measure function

    First contacts the telescope's friends always have many questions, for promotion telescope, how short time closed out the selected telescope function?

   Now promotion telescope can view how far do introduction:

   Ordinary telescope effective distance in 60-1000 meters.

  1. The telescope unhealthily and people's eyesight relevant:

Such as eye chart of letters "E" in 5 meters yuan place test, people with good eyesight can see the bottom line, shortsighted people could only see above a few lines of big "E".

If the was in 50 metres, with 10 times the telescope, equivalent to closing the 10 times, (and five metres distance observation do). People with good eyesight can still see the bottom is same, myopic or only see above a few lines of big "E", the bottom or can't see clearly. Shortsighted people will say this telescope see 50 meters, even the most these letters are not being able to see clearly, and people with good eyesight will say this telescope is very good, with 50 metres was the most these letters can see, you can say this telescope can see only 50 meters?

  2. A telescope unhealthily and object related to the size of the:

For example 1000 metres an ant, you use the telescope, equivalent to ten times the ants close to 100 metres, you must still can not see, you can say this telescope see 1000 meters? If 1,000 metres a person, with 10 times the telescope, then the equivalent man to pull 100 metres, then affirmation is to see.

Eye chart of letters "E" in 5 meters far place test, people with good eyesight to see the bottom is same, shortsighted people could only see the above a few done great "E". Why? Just because the bottom lines letters "E" is too small!

Through telescopes can see 380,000 kilometers of ringed mountain, they did not see the moon is quite near to us the earth satellites, is because they are too small, that is the reason why.

   3. Telescope unhealthily and air quality related:

For example with the same with binoculars, observe 1000 meters outside goal, in sunny day can see a clear goal, and after rain, cloudy day without sun and air a car tail gas, dust and circumstances, could see clearly.

One step closer, if the fog, in the air has a large amount of suspended particles, reducing visibility and so probably 50 meters all could not see, this is the fog weather why blockade highways reasons.

Key words:Monocular Telescope，Telescope
Read more: http://www.nbbinoculars.com/blog/

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