Leica m84/3/2024 Since the Leica M8 has a certain infrared sensitivity, we can take advantage of that and take photographs with infrared light. Films generally are not sensitive to infrared light and digital sensors are made such that they don't record infrared either. This is relatively difficult to do for light of the visible spectrum, and therefore infrared (and ultra violet) usually are being ignored. This allows the lenses to focus all the visible light such that there are no out of focus parts. Lens designers have learned to eliminate that problem by using more than one glass element in our lenses. With other words, regardless how you focus that lens, some of the "rainbow" colors will focus in front and some in back of the focal point, which is always your sensor or your film. The same thing happens when light transmits through a single lens element, like a magnifying glass. When light transmits through a prism, it is split up into the spectral colors with red on one side and blue on the other. Think back a bit to physics class in high school. ![]() LEICA Barnack Berek Blog Novemat 10:55 AM
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