Good optics from rotating hard

Unlike cheaper products is the filter
on a Canon 5D mk II with respect to its optical
Features not to be criticized. Here is my copy
relatively stiff in torsion, so that to zoom
Worked lenses (z. B. Canon 24-70 L USM) ambidextrous
must be. This is actually a no-go because the filter
set new depending on the sun's, which is somewhat common
occurs. Then one does not like it when the seeker suddenly
blurred is because during rotation of the filter, the front
Tube set in motion.
That the binding is dependent on the angle, can on
close dirty or imprecise manufacturing, and the
should not occur at the asking price. The Hope,
that the filter einschleift over time, has unfortunately
so far not been fulfilled.