Comparison AGM Taipan TM25-384 vs Hikmicro Lynx Pro LH25

The degree of image magnification that a night vision device is able to provide without digital image processing, solely due to the optical system. Such an increase is considered to be preferable to digital, because. it does not impair the clarity of the visible image; and for models based on image intensifier tubes (see "How it works"), this is generally the only available option.

Theoretically, the higher the magnification, the greater the detection range (see above), since a powerful increase allows you to see smaller objects. However, it does not always make sense to chase the maximum performance. The fact is that with increasing magnification, the angular field of view decreases and the minimum focus distance increases (see both below), which can create problems at close range. It is also worth noting that a high degree of magnification adversely affects the luminosity of the entire system — as a result, the actual detection range in complete darkness may be higher for a device with a lower magnification, because. it "catches" more light. Yes, and this parameter affects the cost accordingly.

Note that night vision devices, unlike classical binoculars and monoculars, most often have a fixed magnification. Models with the possibility of smooth adjustment are almost never found, and the only option is to use additional nozzles (see "Form factor").

Now on the market are night vision devices with the following optical zoom: 1x, 2 – 3x, 3.1 – 4x, > 4x

— Video output. The presence in the NVD design of an output that allows you to broadcast an image from the device to an external device — for example, a laptop. Thus, you can view the "picture" on a large display and record video even if the night vision device does not have its own video recorder (see below); and if it is available, you can broadcast not only the image in real time, but also the captured materials. The specific video output interface may vary, but most often the signal is transmitted in analogue format.

— Built-in video recorder. The presence of its own video recorder in the design of night vision devices. This allows you to use the device as a video camera, capturing everything that falls into the field of view on video; at the same time, such recording does not require additional equipment, in contrast to working with the video output described above. Video, usually, is stored on a memory card, and in many models it is possible to view the recording directly on the device itself.

— Switching observation modes. The ability to switch observation modes means changing the colour features in the “picture” visible to the user. So, thermal imagers (see "Type") with this function support at least two classic modes "white hot" (the warmer the object, the brighter it is) and "black hot" (the warmer, the darker); in addition, additional format...s can be provided, such as highlighting especially warm objects in red. In classic night vision devices, switching modes usually involves changing the colour tone of the visible image — for example, from classic green to red or black and white. And additional features may include, for example, a high contrast mode.

— Filling with gas. This feature implies the presence in the body of a filler in the form of an inert gas — for example, nitrogen — containing a minimum of water vapor. Such an environment does not oxidize the parts in contact with it, and the “dryness” of the filler also prevents fogging of the optics from the inside during temperature changes. Note that a kind of “side effect” of filling with gas is dust and water protection (see below), since the cases of such devices, by definition, must be airtight.

— Dust-, water protection. The presence in the design of night vision protection against dust and moisture, which prevents the ingress of contaminants on sensitive components. This feature is almost mandatory if you plan to actively use the device in the open air — for example, hunting. Note that the level of security can be different, and a high degree of protection usually means a high price. Therefore, when choosing, it makes sense to clarify the parameters claimed for each specific model and correlate them with your real needs.

— Impact protection. This function involves the use of various means — strong elastic body materials, shock absorption systems, etc. — which prevent damage to the sensitive components of the device during shock and shock. The degree and features of shock protection can vary markedly: usually, such models can withstand drops of at least 1.5 m, but in some cases this figure may be more. Note that for installation on firearms, special protection against recoil is required, which not all shock-resistant devices have.

— Angled eyecups. The presence of beveled eyecups (or one eyecup, in the case of monoculars — see "Type") in the design of night vision devices. The elongated part of the eyecup when working with the device is located on the outside of the eye, almost on the temple; due to this, it provides additional protection for the eye — primarily from extraneous "flare" that interferes with normal viewing of the image in the eyepiece. At the same time, such models do not go well with glasses: at best, the eyecup will have to be turned up, negating all its advantages, and in some devices this is not even possible.

The type of batteries used by the night vision device for operation. Technically, these can be both replaceable elements of a standard size and built-in batteries. However, in fact, the second option is practically not found, because. it does not make it possible to quickly replace a dead battery with a fresh one — and this possibility is critical for most NVD applications.

As for specific types of batteries, the most common options are:

— CR123. The element that has received the greatest distribution among modern night vision devices. These batteries are similar in shape to the popular AA batteries (see below), but their diameter is larger, and their length is noticeably smaller: 17 and 35 mm, respectively. The operating voltage is 3.7 V, which provides good power, sufficient for normal NVD operation. This led to the popularity of CR123.

— AA. Classic 1.5 V finger batteries. The power of such a power supply is lower than that of CR123, which requires more cells; on the other hand, such batteries are easier to find commercially.

— AAA. "Mini finger" or "little finger" batteries, a smaller version of AA cells. Due to their small size, such elements do not differ in power and capacity, and therefore are used only in relatively simple devices for which compact dimensions are important.

The total weight of the night vision device in the working position. If a helmet-mask is included in the kit (see above), its weight, usually, is also taken into account.

The large weight of the device makes it inconvenient to use — both when working with hands and when attached to a helmet-mask. On the other hand, with similar characteristics, lighter models will either cost more or have poor quality materials.