The use of binoculars and telescopes on Earth is widespread in the observation and study of wild animals, especially birds and large mammals. The reasons are to be found in both the unstoppable evolution of natural disciplines (especially Ornithology), demanding the appreciation of every detail in the plumage or appearance of wild animals, even under the harshest environmental conditions, such as due to the availability in the market for a variety of equipment, generally of good or excellent quality, at varying prices. At the time of purchase optical equipment, it raises the difficulty of choosing among the wide range of models and prices available in the market. It is for this reason that Outdoor shop, from their professional experience, offers its customers a complete service for professional advice in order to guide the best choice, depending on the needs demanded and available budget. In this regard, and given the practical impossibility of commenting on the enormous benefits number of models on the market, we have chosen to refer to a selected list of models in each category, we believe best meet the potential needs of our customers. In any case, upon notice, we can report on any other market model is not included in this obligate small selection (which can even be as appropriate as those included). Binoculars or binoculars BINOCULARS indicate their optical characteristics in the housing or frame by a pair of numbers separated by the number sign "X". These numbers refer to increasing or visual power (first number) and the diameter (in mm) of the front lens (second digit), respectively.