Quote:
Originally Posted by Ryderscope
Further to your point Glen, attached is a diagram from the Askar site on the FRA300 that shows the way that the OTA focuses the different wavelengths. If I am correct in interpreting this diagram, it is indicating that the blue light is focused differently than the red and green. If this is the case, it could explain why the blue channel is affected more so by tilt.
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I don't believe this is the case Rodney, its just indicating, in a rather crude way, that off axis light is focused to the same plane, mostly flat field.