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The 450D has a double filter assembly ahead of the sensor, the outside one is LP1 and is the anti-aliasing filter plus functions as a uv/ir cut filter with similiar spectrum passage as say a Baader uv/ir cut, plus it has the dust shaker piezo frame. LP2 sits behind LP1 and is the main blue colour filter that provides the 'natural colour' balance you see in stock camera photos. When you remove those filters you open up the camera to much more Hydrogen Alpha light (like five times as much) and hydrogen alpha is the main emission component of many nebula DSO.
The bayer matrix is the colour filter coating over the pixels on the sensor that give you red, green, and blue discrimination.
A full spectrum mod, which removes the filters, does not involve the sensor surface or its colour discrimination. That mod is called debayering and is significantly more involved.
Hope that helps.
Last edited by glend; 12-05-2016 at 08:18 PM.
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