Does it make a difference? Well, I'd assume so, otherwise you wouldn't have to make sure you used a circular polarizer (rather than a linear polarizer) with auto-focus cameras.
My understanding is that a circular polarizer is, effectively, a linear polarizer with a quarter-wavelength plate behind it to un-polarize the light again, so that anything that depends on light reflected from the mirror works as expected. Putting the glass in the wrong way round would mean that I was using a linear polarizer, not a circular polarizer. On Sun, May 07, 2006 at 11:17:51PM +0800, David Savage wrote: > Look through each side of the filter & see which has the greater > polarizing effect? > > But does it really make a difference? > > Dave S. > > On 5/7/06, John Francis <[EMAIL PROTECTED]> wrote: > > > >I was out shooting yesterday, and my polarizing filter > >fell off the front of the lens and onto the path. > >Fortunately the glass didn't break, but it did pop out > >of the filter holder, leaving me with three pieces to > >reassemble - holder, glass and retaining clip. > > > >My problem is - which side of the filter should be to > >the front? There are no distinguishing marks, but I > >believe that (as it's a circular polarizer) the way > >it goes in is important. > > > >So - how do I find out which is the right way round? > > > > > >
