Astronomical binoculars for observation
Binoculars are not only a convenient solution for monitoring ground objects, but at a sufficiently high resolution is an effective tool for astronomical use. In this material, let's talk about astronomical binoculars, the features of its choice and operation.
- The possibility of using both eyes to observe celestial bodies. While the telescope allows you to view objects through one lens.
- Obtaining a 3D image, thanks to a specific stereo effect.
- A wide field of view makes astronomical binoculars an ideal tool for considering bright comets, star fields, asteroids, etc.
- Effective if necessary to form a clear general plan of the constellations.
- Astronomical binoculars give a direct image. Telescopes create a mirror, inverted picture.
There are several types of astronomical binoculars, which are widely used by amateur astronomers. The most common, budget variant is the model with a multiplicity of 8 × 40. Such astronomical binoculars have the widest possible viewing angle. Its operation makes it easier to find known objects on the sky. Models of small multiplicity are lighter than their more massive counterparts. Therefore, they are convenient for operation as a hand-held observation device.
Binoculars with a multiplicity of 7 × 50 have all the advantages of wide-angle lenses. However, the formation of a clear picture here depends on the illumination of the surrounding space. Therefore, this option is not very effective when used at dusk, in bright urban lighting. At the same time, high multiplicity makes them convenient for considering gaseous nebulae, a cluster of stars.
Devices with a multiplicity of 10 × 50 are the largest astronomical binoculars in the category of amateur devices. They differ in a narrow field of view, which makes it possible to consider in detail the elements of celestial bodies close to the Earth, in particular the Moon. However, the impressive size does not allow to keep such devices in the hands stably. Therefore, in order to conveniently use astronomical binoculars of large multiplicity, it is recommended to purchase a special tripod.
This concept is an important parameter when choosing any binoculars. The collimation of the device indicates that its mechanical and optical parts are aligned with each other. To assess the quality of the parameter setting, it is enough to look at both eyepieces of the binoculars. At the same time, a quick focus on the objects that are located at both small and long distances should occur. Observation in poorly collimated binoculars will necessarily lead to a rapid overexertion of the eyes.
Features of different models
Astronomical binoculars can have a coating of ruby-colored lenses. However, such attractive shells somewhat degrade the quality of the resulting image. Another thing - products with orange filters. How good are these astronomical binoculars? User feedback indicates an improvement in the picture when watching objects through products whose lenses have this kind of coverage.
In costly astronomical binoculars, an angular scale is provided. With its help, you can measure the vertical and horizontal distances between individual celestial bodies. However, the presence of the option does not mean that the scale will be clearly distinguishable in the dark. Therefore, before buying such a pair of binoculars it is necessary to test it in practice, at least in twilight conditions.
The lenses of some astronomical binoculars contain an electron beam coating. At one time, the technology was patented by a well-known optical developer, Fujifilm. Here, the surface of the lenses is processed in a special way, in which the latter pass about 95% of the light. Thus, the observed objects are as bright as possible. At the same time, a high-definition picture is formed.
Astronomical binoculars can contain low-dispersed optics. Application of the technology in the development of the device is denoted by the symbols ED. The installation of such optics makes it possible to avoid the appearance of color distortions that are formed on the lens as a result of the dispersion of light rays reflected from individual bodies. The presence of low-dispersion lenses is a sign of a high-quality product.
Among the models of domestic production of astronomical binoculars, it is worth mentioning the products of the Kazan Optical-Mechanical Enterprise. Here, mainly military binoculars are manufactured, which contain a special marking "BSh". Such devices have a goniometer grid. Optics of excellent quality is installed on them, which makes them an excellent budget solution for observing celestial bodies.
For astronomical purposes, domestic binoculars "Yukon" from the series marked Pro can also be used. Products in this category have orange light filters and a rangefinder grid. It contains hinged covers that act as a screen to suppress glare that comes from the side lights.
The most expensive are imported astronomical binoculars of such famous brands as: Canon, Nikon, Pentax, Fujifilm. Even the cheapest product from one of these manufacturers makes it possible to consider in detail much more celestial bodies than conventional binoculars.
Summing up, I would like to give some advice to users who intend to purchase astronomical binoculars. First of all, do not buy a device in the supermarket. As a rule, such devices have only an attractive shell. However, in practice they are more of a senseless toy than a serious system for monitoring remote objects.
When choosing astronomical binoculars, it is recommended to avoid the production of unknown producers, in particular Chinese brands. Before buying it is worth once again to consult with a knowledgeable person, view reviews of interesting models, prepared by experienced users.