Circular polarizing filter and a deep lens hood

This filter works best when the light is coming from the side. If the lens hood is deep and no side light is striking the lens front element is the filter no longer beneficial?

Anyone?

I think you may be confusing this with lens flare. Light from the side without a hood may cause flaring. A polarizer filter alters the polarized light being reflected off the subject. The filter is just as effective with a hood, or without, but easier to rotate without the deep hood in the way.

chuckmiller wrote in post #19130733
This filter works best when the light is coming from the side.

Please explain how you have come to this conclusion. I think you have misunderstood how polarizing filters work.

Polarizering filters cut the amount of reflections of light off shiny surfaces. The reflections themselves are polarized light, so the filter reduces polarized light whose rays run a particular direction; if the light does NOT run in that one direction, there is no reduction.
(conventiently we're ignoring the fundamental reduction of light by the filter).

Hoods have zero impact on the effect on the polarizer...they only make the filter physically more difficult to grab and rotate to the proper orientation.

Filters alter what is IN the field of view, hoods alter what is OUTSIDE the FOV so that extraneous flare-causing light striking the front of the lens is excluded.

For the polarizing filter to be useful, the light source would be in a location in which the lens hood is not needed. I reverse the lens hood so I have access to the filter, also, I only spin the filter the same direction as it screws on, so that it doesn't get unscrewed.

windpig wrote in post #19132828
For the polarizing filter to be useful, the light source would be in a location in which the lens hood is not needed. I reverse the lens hood so I have access to the filter, also, I only spin the filter the same direction as it screws on, so that it doesn't get unscrewed.

yes. exactly