The basic function of any range finder is to measure the distance to the object, but the functionality of the instruments can also be supplemented with measurements of speed, angle, height, projection, etc. But some rangefinders, specially designed for shooters and hunters, can display even extraordinary functions that help to guide both can be more aimed shooting. A vivid example of such a device is the laser rangefinder Leica Rangemaster CRF 1600-B 7×24, which determines temperature and atmospheric pressure, and also provides for the selection of one of the 12 ballistic curves corresponding to a specific ammunition for correct correction input.
are distinguished by ergonomic, thoughtful design, corresponding to the concept of modern engineering. Taking into account that the device can be used in different weather and operational conditions, as a rule, the range finders have at least a moisture-and splash-proof casing, and ideally a fully waterproof and dust-proof casing. Naturally, this degree of protection does not mean that the device can be used under water, but it is guaranteed to protect against penetration of moisture inside the housing, condensation and fogging of internal surfaces, as well as penetration of dust particles and other microparticles into the housing, which could adversely affect the image quality .
Control of the range finder is usually done with just two buttons:
Buttons that also perform the function of measurements
Disabling rangefinders, as a rule, is carried out automatically after a certain time of inactivity (usually in 8-15 seconds).
With the help of range finders it is possible to measure distances to objects with high reflectivity (for example, road signs), with an average reflectivity (for example, various building buildings) and with low reflectivity (for example, trees, golf flags).
The highest accuracy and range of measurements with the rangefinders is achieved when the following conditions are met:
Measurements are made for objects of medium and high reflectivity. Simply put, the higher the reflectivity of an object, the more distant distance is achievable for measurements with the help of a range finder. So, for example, if the specification of the device claims a maximum distance for measurements of 1000 m for objects of medium reflectivity, then, for objects with high reflectivity, a longer distance, for example 1200 m, is likely to be available. But for objects with a low reflectivity, there can be an achievable distance of only 600 m.
Other things being equal, the rangefinder will work more efficiently when the reflective surface is perpendicular to the direction of laser radiation.
Measurements are carried out on a sunny day, but not against the Sun.
Sufficient area of the reflecting surface. The ability of a range finder to perform accurate measurements depends on both the area and even the shape of the object. A large flat surface will be preferable. In the case where the object is too small and thin, and in the neighborhood are other objects, the range finder can measure to the “erroneous” goal.
Usually the manufacturer does not guarantee the proper operation of the rangefinder under the following conditions:
When heading to the sky or against the sun’s rays
In rainy, foggy or snowy weather. True, there are rangefinders with Rain and Refl modes for working in rain and fog, respectively, at short distances (for example, a laser rangefinder National Geographic 4×21 / 800m). Also there are high-precision rangefinders with integrated rain mode, which allows accurate measurements even in the rain conditions even at longer distances, for example, rangefinders Hawke LRF Pro 400 WP, Hawke LRF Pro 600 WP, Hawke LRF Pro 900 WP.
Measurements are made with respect to objects with extremely weak diffuse reflectivity, for example, electrical wires, lakes, etc.
Some rangefinders can have a socket for mounting on a tripod, which helps to stabilize observations. When choosing a rangefinder it is worthwhile to carefully weigh what to buy, since the presence of a tripod socket can save the situation when it is necessary to measure the distance to a relatively small object located at a great distance. Moreover, if the required object is among a group of others, in this case, without a tripod, you can accidentally measure the distance not up to that object.
It is good even when the range finder additionally has a focusing mechanism (diopter adjustment ring) on the eyepiece.
As a unit of measurement, distances are usually meters or yards, and switching between them is done by holding the Mode button. It is very convenient when the range finder provides a scanning function that allows continuous measurements by pressing and holding the On button. But keep in mind that working in this mode consumes more energy, so if you use it often, you may soon need to replace the batteries in the battery compartment.