[Military binoculars purchase] How to buy military binoculars There is a coup for the authenticity of military binoculars
The basic principle of military binoculars is no different from that of ordinary civilian binoculars, but the use of military binoculars is no different. The environment has higher requirements, and the ability to observe the target is also clearer and stronger, which is the main difference from civilian telescope
s. The casing of military telescopes is basically made of metal instead of plastic to ensure that it will not crack or deform after long-term use. In contrast, ordinary civilian telescopes not only use plastic casings, but also use plastics for internal lenses because of different use environments and various requirements.
When shopping for military telescopes, first of all, they have different optical systems. Most military telescopes have a reticle, and the reticle used at night is also illuminated. The exit pupil distance of military binoculars is relatively large, so that the observer can wear a gas mask. In order to prevent hitting the head when shooting, some sights have an exit pupil distance as large as 70 to 80 mm, and also have eye masks and forehead protectors with moderate hardness, which are obviously not considered by civilian telescopes.
In terms of optical performance and structural performance, military telescopes are better, because their design is more prudent, the materials are excellent, and the craftsmanship is exquisite, such as good image quality, less stray light, magnification and entrance pupil size Matching for optimal resolution also makes it more reliable in harsh usage environments.
Because of high quality requirements, military telescopes must undergo strict environmental tests before leaving the factory, generally including vibration test, high temperature (1055??) test, low temperature (145??) test, rain or water immersion Test, air tightness test. After these tests, the product performance can still be guaranteed to be within the specified range before leaving the factory. Some products also have their own dryer in the lens body. Before leaving the factory, the air is drawn out and then filled with dry air or nitrogen, which can effectively prevent the internal lens from growing mold and fog in the future. Ordinary civilian telescopes generally do not do environmental tests, or only do part of the tests. This is difficult for people to understand from the market, nor can it be seen only from the appearance of the product.
Because of these differences, military telescopes are much more expensive to design and manufacture, so their prices are also higher than ordinary civilian telescopes.
As mentioned above, military binoculars are special binoculars for the armies of various countries, and they cannot actually be sold in the civilian field.
If you are not familiar with the military binoculars currently on the market, it is recommended that you do not buy military binoculars. The concept of military binoculars on the market has been stolen by many small manufacturers. Quality and quality cannot be guaranteed at all.
If you don’t buy a military telescope because of the concept of a military telescope. In fact, a simple understanding knows that if it is a real military telescope, the country will not let it be sold. This is military stuff.
Military binoculars have a coup for authentic identification
First, look at the material. Military binoculars are all made of metal, with strong sealing, waterproof, dustproof, soil resistance, and durable. However, some counterfeit telescopes on the market have a hard plastic shell inside and a camouflage, black, and gray-white rubber skin on the outside. They have poor sturdiness and tightness, are easily damaged, and are easily invaded by moisture and dust inside.
Once the inside of the telescope is invaded by water vapor and dust, the observation effect will be deteriorated. More importantly, all military telescopes are made of high-quality optical lenses. The surfaces of all lenses are coated with high-quality light blue, light purple and light yellow antireflection coatings. The prisms are BaK4 type materials. The degree of observation is extremely high, and the observation field is extremely broad and sharp.
The counterfeit telescopes use ordinary or inferior optical materials, and the lens is coated with a bright red film, which claims to have the function of ‘infrared night vision’. In fact, it is not an infrared telescope at all. The actual observation has a feeling of blur and dizziness, and the optical performance is very poor.
Second, look at the appearance. The appearance of military binoculars is generally black, and a few are camouflage. Both are painted on metal or decorated with cadmium sulfide skin, and there is a metal sound when struck with a small hammer. In addition, the engraved serial number is engraved on the metal mirror body. The counterfeit binoculars have the appearance of camouflage or black rubber skin, and some are coated with silver-white paint on the hard plastic shell, which looks like metal, but it is not. Some also have a compass, coordinate lines, Russian, Russian emblem, cannon and red star printed on the mirror body, and red star or eagle pattern on the red glitter coated lens.
Third, look at the three parameters that indicate the performance of the telescope: magnification, objective lens aperture and horizon value. The most important parameters are the multiple and the entrance aperture of the objective lens, and the specifications of the telescope are expressed by these two parameters. For example, ‘8??30’ means that the magnification of the telescope is 8 times, and the entrance aperture of the objective lens is 30 mm. Generally, the multiples of hand-held military telescopes are between 6 and 20 times, of which 6 to 10 times are the best, and a tripod should usually be configured for more than 10 times. Otherwise, the observation effect will be poor due to factors such as hand shake, heartbeat, breathing and air convection. >>What does the multiple of the telescope mean
Regular military telescope, with real magnification and excellent optical performance. The counterfeit telescopes are marked with tens, hundreds, and thousands of times, claiming to be able to see tens of hundreds of kilometers, and their real magnification is generally between 3 and 6 times. A hand-held binoculars can be judged to be a counterfeit binoculars based on the fact that its marked magnification is more than 20 times. If readers and friends make a comprehensive judgment based on the knowledge mentioned above, it is not difficult to identify the authenticity of the binoculars.