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Binoculars for Bird Watching

2023-03-15

Why not Spotting scope? It must be installed with a tripod, otherwise it will shake so that you can't see it at all. The tripod is both an expense and not conducive to carrying. The point is, with spotting scope, as a beginner, you can't find birds at all! The minimum magnification of Spotting scope ...
Interesting Science：How to see ants 10,000 kilometers away with a telescope?

2023-03-06

Assuming that an ant is 1mm long, then if it is observed from 10000km away, the ant has about 3×10−43times10^{-4} milliarcseconds! ! ! ! What kind of concept is this? It is 100 times more precise than the best astronomical observations at present. For an ideal optical system, its maximum angular ...
How Far Can The Binocular Telescope See?

2023-03-02

Factor 1. Stability When looking at something far away through a telescope, stability is important. Generally speaking, when holding a telescope with a power of more than 10 times, because of human breathing, heartbeat and shaking of the supporting hand, looking at distant scenes will cause the ...
How Far Can The Binocular Telescope See?

2023-03-02

Factor 1. Stability When looking at something far away through a telescope, stability is important. Generally speaking, when holding a telescope with a power of more than 10 times, because of human breathing, heartbeat and shaking of the supporting hand, looking at distant scenes will cause the ...
Tips for measuring distance with a rangefinder

2023-02-20

The true range of golf rangefinder Tips for measuring distance with a rangefinder: The measurement distance of the rangefinder is related to the measurement target, because it is the principle of laser ranging, which is related to air quality and light influence. 1. If there is fog or haze in the ...

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