Lens diameter (opening) and enlargement is the main one, but not the only features important for the action and use of each binoculars. It is also worth paying attention to other attributes such as the following:
Anti -reflective layer – significantly improves the contrast of the image and makes, that it is more sharp and convenient to observe. At the same time, this layer improves the optical efficiency of the binoculars. Different colors of the layer affect the optics in different ways, Some are better to observe during the day, Some are a better solution for night observations.
Kolejnym takim atrybutem jest konstrukcja mechaniczna lornetki – It is primarily about the quality of workmanship and finish, Materials used, Moisture resistance, water and shocks and, for example, the precision of focusing.
Sprawność optyczna lornetki – This is a general feature that characterizes how well the right materials are selected and how the binoculars work
Image quality in the field of view – Particularly important during astronomical observations
Color correction (professionally called chromatic aberration)
Long eye (pupil, z ang. eye relief) – There is no need to apply the eye directly to the lens.
A very important part of every binoculars is układ soczewek stanowiących obiektywy oraz układ soczewek, które stanowią glasses. However, remembering physics lessons in your head, class experiences and basic optics rights we guess, that such a system gives an inverted image of 180 degrees. Po to, To get a normal image between the lenses, a prism is mounted, thanks to which the image becomes inverted.
There are two types of types of prisms in binoculars considered basic:
– Binoculars with roof prisms: They have a much more solid structure and are smaller than porporeal binoculars (see paragraph below) . However, their production is relatively expensive, and light losses are slightly greater than when using the second type of prism. They are definitely better for day observations than astronomical.
– Gorne binoculars: Binoculars, which have the so -called. Porro have larger sizes, but thanks to this, that the exact performance of the entire system is relatively easy, they provide good view of the view. These binoculars are cheaper than binoculars with roof prisms.
