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Here's how bad internal reflections (at the sensor surface layer) can get with multi-million dollar professional telescopes. The EOS uses a 32x CCD camera sensor array to capture images. It's a very powerful deep space observation instrument.
ESO "...circular features in the image around bright stars are not real, they are due to reflections within the optics of the telescope and camera"
Subject Captured: The Cat’s Paw and Lobster Nebulae.
I think these aberrations are horrendous and (in my own opinion) un-correctable.
