This is a simple trick to be able to use a polarizing lens with a lens hood.

A polarizing filter is used to remove reflections and glares from non-metallic surfaces, including the haze from water molecules in the atmosphere.  The polarizing filter rotates in its mount and the result is immediately seen in the camera’s viewfinder or display screen on the back of a digital camera.  Reflections and glares are reduced or removed, and skies become a darker blue allowing clouds to stand out.  Colours can become more vibrant.  By turning the polarizing filter, you can increase or decrease this effect. 

Remember, this effect depends upon the light present and the angle you are to the light source.  On a dim day, don’t expect much of an effect.

If you want to use a lens hood and be able to rotate a polarizing filter you may have a bit of a problem.  Essentially, you would need to take off the lens hood, see the result as you rotate the polarizing filter, then place the lens hood back on the lens.  This is very time consuming and, to say the least, inconvenient.

My simple solution is to purchase a screw-in lens hood.

If I am using, for example, a 77mm screw-in polarizing filter, I would buy a lens hood with an 82mm screw mount and attach it to the filter via a 77mm to 82mm adaptor.  This allows for a generic lens hood to be fitted on the filter without the edge of the lens hood being caught by the lens. 

Another trick is to use a larger polarizing filter and mount it to your lens via a step-up filter adapter.  For example mount a 82mm filter to a lens with a filter ring of 72mm via a very inexpensive step-up adapter.  Then use a lens hood appropriate for an 82mm screw-in filter.

If I am not worried about the light source causing flair (hitting the lens from the side) I usually use a lens hood designed for wide angle lenses, even with a telephoto lens.

Remember, a polarizing filter mount is usually thicker than other filters due to its rotating mount, adding a few millimeters to its thickness which a wide angle lens may catch at the corners.  There are polarizing filters with thin mounts, usually for a few dollars more.

I have similar arrangements for 52mm, 62mm, 72mm, 82mm and 95mm filter sizes.

Now I am able to rotate the filter and have a lens hood to keep fingers and dirt from the filter, along with keeping stray light from hitting the filter.  Also, it is now easier to rotate the polarizing filter.

I use different lens hoods for wide angle and telephoto lenses.  For a wide angle lens, I use a lens hood specific for wide angle lenses.

This method works well and I have had no problems.