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Is filtered imaging going to be superceded?
Sony is working on 2 types of sensors that could have uses in astrophotography.
One is an active RGB filter array that moves to do the RGB exposure and combines the 3. I imagine that would have to be done super fast or at least match 1/3rd of the shutter speed to work.
The other is a Foveon style sensor where RGB data is collected off the sensor rather than through filters in front of the sensor. Foveon works by extracting the signal at various depths in the silicone as red goes deepest green the 2nd and blue the least.
The trouble with existing Foveon sensors (Sigma Foveon cameras) is they are very noisy at higher ISOs.
But imagine a sensor that gives colour images but every pixel counts and no light sapping filter array in front of it and 4 pixels played with to make a colour image.
Greg.
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