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I'm with you Carlton . CA has nothing to do with I/R. CA is caused by the different angles of refraction through the lenses of REFRACTORS. Better lenses or more lenses in order to bring the wavelengths back in line can correct that. I/R is there regardless and is a glow around bright objects where I/R wavelengths are emitted from the object such as stars. Without I/R cut, all naked sensors will pick up this glow regardless of the optics causing bright I/R emitting objects to " bloat " in the image.
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