A binocular is something linked to the prism . This term (prism), meanwhile, refers to a body that is made up of two flat polygons as bases and with a variable number of parallelograms as sides.
In the field of optics , a prism is a triangular-shaped glass element that is used to generate the decomposition, refraction and reflection of light . This definition allows us to delve into the idea of binoculars.
Binoculars are glasses that, inside, have tubes with prisms that allow the images to be enlarged . These prismatic glasses , also known as prismatic glasses , are used to observe objects that are at a great distance .
The binoculars have two tubes. In each of the tubes there is a prism and several lenses that allow the image to be enlarged for each eye. Thus, binoculars generate stereoscopy (the sensation of depth or relief).
Because they allow you to look with both eyes simultaneously, binoculars are binoculars . The user can focus the image easily thanks to a small wheel.
Binoculars are classified according to the diameter of their objective and the level of image magnification. The 10X60 binoculars, to name one example, make it possible to enlarge the image ten times ( 10X ) and have a 60 millimeter diameter objective. If the magnification is 12X or more, the binoculars must have a tripod or other support, since natural hand movements cause the image to shake.
One of the myths that are incorrectly spread among those who want to get started in the world of sighting through binoculars is that a greater number of magnifications results in a better experience; but this is simply not true. The key to choosing good binoculars is finding those that allow us to satisfy our specific needs, and to do this we must ask ourselves a fundamental question: what do we want to observe? Among the most common answers are "birds", "the stars" and "landscapes".
Long-range binoculars have a series of disadvantages that we must take into account before purchasing them. Despite offering a large number of magnifications (12 or more), they can generate the following problems:
* vibrate too much : as mentioned above, from 12x magnification it is necessary to use a tripod to stabilize the image, because the pulse of our hands can generate images that move uncontrollably. This phenomenon is directly proportional to the number of increases, meaning that it becomes worse the more there are;
* smaller field of view : this means that the images are not panoramic and, therefore, it is more difficult to locate the objects we want to observe, whether they are stars on a clear night or birds in mid-flight;
* Darker : Since the exit pupil size is smaller, images appear darker;
Below we will see some examples of the most common uses of binoculars according to their magnification:
* with zoom : this is the basic option, which allows us to adjust the magnification without exceeding a relatively moderate range. The image quality is much lower than that offered by binoculars with a fixed number of magnifications;
* with 7x or less: fields de visión amplios pero imágenes más lejanas, perfectos para observar animales en movimiento y para una orientación al observar el cielo;
* 8x to 10x : the ideal magnification amount for bird watching and nature observation in general, although they are also used in astronomy. The images have a good level of luminosity;
* with 12x : observation of animals at long distance and from a fixed point, since they require the use of a tripod ;
* with 15x or more : to observe the stars and other planets. The tripod is also necessary.