The use of binoculars and spotting scopes has been generalized in the observation and study of wild animals, especially birds and large mammals. The reasons are to be found both in the unstoppable evolution of natural disciplines (especially ornithological), who demand the appreciation of detail in feathers or aspect of wild animals, including in environmental conditions tougher, as due to the availability in the market for a wide variety of equipment, generally of good or excellent quality, at varying prices. When acquiring optical equipment, then raises the difficulty of choosing among the wide range of models and prices available in the market. It is why air free shop, from his professional experience, offers its clients a complete service of professional advice, with the purpose of guiding the best choice, depending on the demanded needs and available budget. In this sense, and unable to practice of commenting on the enormous benefits number of models existing in the market, have opted to refer us to a select list of models, which in each category, we believe are more responsive to the potential needs of our customers. In any case, and prior requirement, we can inform about any other market model not included in this inevitably reduced selection (which may even be as appropriate as those included). Binoculars BINOCULARS or binocular indicate their optical characteristics in housing or mount using a couple of numeric digits separated by the sign X. These numbers refer to the increase or visual power (first digit) and diameter (in mm) of the front lens (second digit), respectively.
Thus, a prismatic indicating in its mount 8 x 40 means having 8 increases, and their front lens diameter is 40 mm. POWER the power of the prismatic, i.e. the increase, is a factor of great importance, and indicates the capacity of the binoculars to zoom in the image. As we have pointed out, the increased value comes indicated by the first digit of the pair registered into the mount.