Join Ben Long for an in-depth discussion in this video Understanding Foveon sensors, part of Learn Photography: Shooting in Raw Mode.
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- The explanation that I've been giving…for how a digital image sensor works…is true for most of the sensors out there.…However, every once in a while…a new technology comes along that works differently…than the demosaicing interpolating sensors…that we've been looking at.…The most significant of these is the Foveon sensor,…which today is used in certain Sigma cameras.…Now, Foveon's claim to fame is that…there's no demosaicing in their sensors.…Each individual cell on the surface of the sensor…captures full color, all three channels.…The Foveon sensor does this by…exploiting the fact that silicon absorbs…different wavelengths of light at different depths,…so red light can penetrate further…into a piece of silicon than can blue light.…
The Foveon chip takes advantage of this…by stacking photo sights on top of each other…within the silicon, so in a given location,…the red channel is measured at one depth,…the green at another, and the blue at the top.…This means that every pixel on the surface…can read all three color values.…
In this course, photographer and educator Ben Long shines a light on what it means to shoot in raw—and what it doesn't. Learn the benefits of shooting in raw, learn when your camera's RAW+JPEG mode makes more sense, and get insights into why some people prefer certain raw conversion software over others.
- Does your camera support raw?
- Understanding how a sensor works
- Correcting and compressing JPEGs in camera
- Customizing JPEG compression
- Understanding raw conversion
- Working with raw files in popular photo-editing software
- Shooting raw, JPEG, or both
- Reprocessing old raw images
- Choosing a camera