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At about 20X - X40 prime focus magnification with an Achro - which these shots represent, CA will not be noticeable . At X400, using eyepiece projection for a descent close up shot the CA in these Achro refractors will be absolutely objectionable in the pictures - even for visual observing pretty useless....
I am not sure exactly what you are proving in these photos - the subtext being that somehow CA in achros is an overrated criticism ?
Have attached a picture of Copernicus using frame stacking , by Anthony Wesley using a basic 10" F6 reflector in 2005 - just to put some perspective on this !
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