all air-lens surfaces are provided with an extremely thin anti-reflection coating to optimise the "light movement" (transmission) through the binoculars to the eye. In this case, the entire lens is coated [...] blue coating: a magnesium fluoride coating is, of course, standard. Multi-layer or multi-coating: all lens surfaces are vapour coated with several or many layers of coating. What does the information relating [...] factor mean? These arithmetical values are calculated from the ratio of magnification and objective lens diameter. Important in practice: an exit pupil between 2 and 3 mm is sufficient for use in daylight
coating on all air/lens surfaces optimises “light movement” through the binoculars to the eye. For the highest vision requirements, most models have an intricate multi-layer coating on all lens surfaces. This
expeditions, but are also perfect for air travel and family holidays. What’s more, with their wide angle lens, for example, or lenses manufactured from extra low dispersion glass, these binoculars provide true
