It is amazing that knowing only what the two numbers on the binoculars mean, you can say so much about the optical device! They prefer lightweight binoculars to powerful ones. Therefore, tourists rarely choose powerful binoculars with diameter lens of 50mm. The larger they are, the heavier the optical device. The size of the lenses directly affects the weight of binoculars. Powerful binoculars are more suitable for observing wild animals or when observing distant objects, 5,6 or 10km from you. To observe other objects, near the observed one, you will have to change your binoculars direction.īinoculars with magnification 6x will not show many details, but will allow you to explore and observe a group of objects.Īt stadiums it will be much more comfortable to observe objects with the latter. In practice, this means that magnification 10–12 times will allow a detailed observation of only one object. The smaller the magnification power, the wider field of view your binoculars will have.
The greater the magnification factor, the smaller the area covered when looking through binoculars. The magnification power is inversely proportional to the field of view of binoculars.
Now you know not only what the numbers on the binoculars mean, but also what is hidden behind them. 40-42mm lens will be an ideal choice for bird watchers.įor night observations you have to take a specially designed night vision device for this. In the daytime, you can do well with a model that has aperture of 25-30 mm. This parameter is important for situations when this light is not enough.įor example, for observations at dusk and dawn, you need binoculars with a lens diameter of 50mm or more.
The size of the binocular lenses determines how well the optics will collect light. It becomes very difficult to see the details when looking through binoculars. When magnified over 10 times, you can’t comfortably hold binoculars because the weight of the binoculars.Īs a result you get shaky and blurry image. These are the best binoculars with which it is comfortable to observe objects without a tripod. The classic and the most comfortable magnifications are 8x and 10x. It can be either 6 times or 20 times or even 100 times. Magnification power of binoculars is how close a distant object can be brought to your eyes when looking through binoculars or how many times it can be magnified thanks to binoculars optics. Is it possible to find out the scope and purpose of use of binoculars if you understand those numbers? Do these numbers impact the cost of optical instruments? Is it good when these numbers are large, or maybe, on the contrary, we should choose binoculars with small numbers? You need to understand the capabilities of optics behind them. However, even after such a description for an unprepared user, the numbers on the binoculars will be uninformative. Thus, the answer to the question “What do the numbers on binoculars marked 20×50 mean?” is as follows: the magnification of the binoculars is 20x, and the diameter of its lense is 50mm.īTW, the the bigger the diameter of the lens the more light it transmits and the brighter is the image produced by binoculars. I recommend to keep this in mind because all optical devices come with different types of descriptions, i.e. It is worth noting that the binocular magnification power is often called magnification factor and the diameter of the lenses – aperture or light diameter. The first number indicates the magnification power of the binoculars and the second number is the diameter of its lenses. In fact, understanding the numbers on binoculars is the first step in getting to know its technical characteristics. That’s why we need to understand those numbers and characteristics so we can choose exactly what we want. They determine what exactly can be seen with the binoculars, and when it can be used.ĭifferent binoculars may look slightly identical but differ a lot due to their technical characteristics.
Those numbers are seen on the binocular body and also indicated in the instruction to the binoculars.īinoculars, like any optical device, have many technical characteristics. One of the very first questions you may have is: “What do the numbers on the binoculars mean?” Usually, we can see two pairs of numbers on binoculars, separated by x. This means you can choose the right binoculars only if you understand those numbers. Binocular is a complex optical device and its magnification and features are determined by its technical characteristics.
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