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WHAT REALLY MATTERS.
One of the most important parameters of a
In low light conditions such as in rain, dusk or dawn a high light transmission can make a decisive difference.
However, light transmission does not always equal light transmission. Each binocular has many different values for light transmission, depending upon the wavelength of light (color). Conventional binoculars tend to deliver limited peak values only at a certain wavelength (for example: blue) but lose other colors' transmission (for example: red) of up to 30%. The result of such trans- mission peaks, are color distortions – therefore high peak values will not improve your binoculars but are actually counterproductive for a true bright color image.
However behind this relatively simple sounding issue lies a substantial challenge. Optical lens coatings deliver high
transmission values only for a very specific wavelength. At the same time, however, it can have adverse effects at other wavelengths on light transmission, image sharpness and depth of field. This is why higher quality binoculars require multiple layers of lens coating that together result in good performance for the most important colors. Con- ventional technology was able to maximize only one of the four key optical performance parameters: Either light transmission, or color fidelity, or sharpness, or depth of field. The remaining three parameters have always been compromised.