Everything you need to know about magnifying glass

Almost everyone at home has at least an ordinary household magnifier with a small magnification. Perhaps this simple optical device is rarely used, but sometimes it becomes an extremely necessary thing.

However, few people seriously think about the magnification of the lens. In other words, how much a magnifying glass magnifies objects is often unknown to the owner, although knowledge of this characteristic makes it possible to use the device more efficiently. This article will tell you all about the magnification of a magnifying glass.

The diameter of the lens and its magnification are characteristics of how clear and magnified an image a magnifier can produce. To understand the expression "magnification factor", you should know that the most acceptable distance for a better examination of things or inscriptions on them with the human eye is 25 cm (250 mm). If objects are too close (for example, up to 5 cm), it will be difficult to see them, since their contours are blurred.

The magnifying glass lens is designed specifically to help the eye see objects (focus) at close distances. For example, a 2.5 cm focus lens will help you see things at the same distance from them (2.5 cm). In this case, the image quality will be no worse than when looking at an object at a distance of the same 25 cm. The object is “enlarged”. The multiplicity of such a product will be equal to 10 units.

Magnifier magnification is also called magnification ratio, actual magnification capacity, or simply magnification.... Finding out this value is quite simple. To do this, you need to divide the value 250 (which we talked about above) by the focal length in millimeters. In this case, the value in this formula is called "magnification", and is denoted by the letters MP (Magnifying Power).The focal length is abbreviated as FL (Focal Length). The resulting value is indicated by a digit with the addition of the multiplication sign "x" (for example, 10x).

There is an easier way to check the magnification of the lens. To do this, you need to find out diopters. The larger they are, the greater the increase will be. This method is suitable for cases where the exact value is not so important. However, the obtained value may not always be correct. Theoretically, you can count everything correctly, but in practice the result will not be entirely expected.

As already mentioned, the magnification factor directly depends on the focal length.... The latter is determined curvature of the product. The larger it is, the less focus. The smaller the focus, the higher the magnification. The smaller the diameter of a commercially available lens, the greater the values ​​of its curvature and, of course, magnification. Thus, if the curvature is less, then the diameter of the product will be larger, and the multiplicity will be less. Simply put, a wide loupe allows you to see a large area, but with a small increase. The small diameter magnifier magnifies well, but covers limited space.

Small magnifiers tend to distort the objects in question. When choosing a simple household magnifying glass, you will have to make a choice either in favor of the covered space or in favor of quality. Products with a double lens are considered the best option. In the case of the subsequent purchase of an expensive product with several lenses, the problem of choosing between image quality and coverage is eliminated. Such settings can provide both high definition images and wide coverage. But they are distinguished by their large dimensions and impressive weight.