What is false color, and is it a problem?
The term false color refers to the spurious color fringing seen when observing bright stellar and planetary objects with an achromatic optical system. Essentially, a conventional achromatic objective lens design, such as is used in most binoculars, is unable to bring all the colors of the spectrum to focus at exactly the same point. This means that there will be some purple fringing around the brightest objects. Generally, chromatic abberation only becomes noticeable on the brightest stellar and solar-system targets. Usually, it is more pronounced the larger the binocular and the higher its magnification. Chromatic abberation is not usually an issue on deep space objects. Our Binocular Telescopes and some of our Signature Series binoculars have particularly good on-axis suppression of chromatic abberation.
