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Most people believe that the higher the magnification of the telescope, the better the viewing effect, but the fact is the opposite. In the case of the same objective lens, the higher the magnification, the worse the image quality and the blurry the scene. . If you use a telescope to watch scenery, performances, competitions..., it is generally best to choose a magnification of 7 to 8 times, because with this kind of low magnification lens, the image will be brighter, more stable, and the field of view will be larger; if Use a high magnification lens of more than 10 times to observe, you will find that it seems to be larger, but the field of view is smaller (for example, you can only see one corner when you look at the stadium, and you can only see a few actors when you look at the stage...), at the same time The image becomes darker and the stability becomes worse (experienced shaking). Because it is difficult for ordinary people to hold a binoculars 10 times or more with their hands for a long time, in fact, you will find that it is not easy to use a binoculars. Find the goal. Most military telescopes in various countries around the world use 6 to 10 times. my country's military telescopes are mainly 7 times and 8 times, because clear and stable imaging is very important.
Some dealers are slanderous, boasting that their telescopes can magnify tens or hundreds of times, and use false high magnification to attract and deceive customers, making many consumers deceived. For example, the guaranteed magnification without a large enough aperture is like a photographic film without a high enough resolution guarantee. If their binoculars can really magnify several hundred times, then the scene you see is like a photograph Ordinary negatives are magnified to the size of a sports field. Can you tell me what else can you see clearly? ! I believe that friends who have read this article will never believe those nonsense again.
If you need to observe the details and close-ups of certain small-scale scenery (such as bird watching, animals, observing celestial bodies, etc.), or photography and video recording, you must use a telescope that is more than 10 times larger (for clear imaging, the aperture must be increased accordingly) , But at this time you must be equipped with a stable tripod for the binoculars.
Can't see clearly what is the main factor?
The larger the clear aperture of the telescope (roughly equivalent to the diameter of the objective lens), the stronger the ability to collect light, and the clearer the image will be seen (professionally called "resolution" or "higher resolution power"). The size of the clear aperture of a telescope limits the allowable magnification, so if you want to see more clearly, not to increase the magnification, but to increase the clear aperture. But for handheld binoculars, the increase in the aperture of the objective lens will make the telescope bulky, so the aperture of the handheld binoculars should not exceed 60mm, otherwise it will not be able to hold it without a tripod. If you often use binoculars in bright places. Then it doesn’t matter if the caliber is smaller, but if you want to observe the target under relatively dim lighting, such as watching a stage with poor lighting, animals in the dark, or observing celestial bodies, then a larger caliber is very important. It will directly affect whether you can see the goal clearly.
Of course, the scenery in the telescope is not clear. In addition to the aperture, it is also related to many other factors, such as the material, shape, structure, grinding, gluing, coating, installation, debugging process, eyepiece type, quality, etc. of the lens. Therefore, even telescopes with the same aperture can cause huge differences in imaging quality due to the above-mentioned factors. It is usually difficult for outsiders to understand and identify these.
Generally speaking, you should choose a binoculars whose caliber, weight, size, quality, price, etc. are suitable for you according to your purpose of use, use environment, economic conditions, etc.
