Optical coating for binoculars - a science in itself
The CoatingIf light hits a glass-air surface (e.g. with a roof prism), the reflection causes a loss of light. " More info or remuneration of a lens is complex and has very high influence on the optical quality of the optics and on the price.
Especially here the big differences between good and mediocre binoculars is visible - especially with Brightness, contrast and image brilliance.
A LensWhen we talk about the objective lens of binoculars, we mean the front lens. The front lens is the foremost lens of the objective. " More info resp. PrismLenses have the property of imaging objects upside down and laterally inverted - therefore the image must be rotated again. " More info consists of several LensesThe use of aspherical lenses leads to a reduction in the overall length of the binoculars and in some cases to a significant reduction in weight. " More info whereby some GlassIn addition to the coating of optics, the glass quality or type of glass is one of the most important quality factors for binoculars and riflescopes " More info air transitions exist in binoculars. This leads to Stray light and light loss. Through CoatingsWith the help of a simple coating, this loss of light transmission (transmission loss) is reduced to 1.5%, for example. This already increases the amount of light that reaches your eyes to around 80%. " More info light losses are reduced and the amount of light that reaches your eyes is increased.
In a multi-coated lens, the lenses are provided with several layers of coating. This multiple coating, also known as "multi-coating", is used to equip high-quality optics for brighter image reproduction and high-contrast images. In addition to the optical properties, the mechanical properties of the coating are also important.
Non-stick coatings for binoculars
The Top models of the most Binoculars manufacturer have Water and dirt-repellent coatings on the outer Lens parts, whereby WaterThanks to the DDoptics RNP coating on the outer lens surfaces, water does not adhere to the glass. " More info Beads off easily and cleaning is made easier in the event of soiling.
The binocular manufacturers have developed Nano-coatings own designations or patents such as:
- LotuTec at Zeiss
- Raindefender Nano Protection (RNP) at DDoptics
- AquaDura at Leica
- Swaroclean at Swarovski
- Nano-Protection with Steiner
Especially with the Cleaning the binoculars must paid attention to becometo avoid damaging the coating.
