Originally posted by Kendra59 That is what I hoped would be the case. The circular polarizer... is it needed because of the digital sensor, or because of digital specific lenses, or...?
In my opinion the only filters of value on a DSLR are CPL, ND filters and IR filters, because in general you can't recreate the effects they have on the image in post (yes, there are techniques to simulate some of the effects (stacking multiple exposures to simulate a long exposure with a ND filter, or using presets in post processing that create a look similar to IR images), but those techniques don't always work and they might look similar but not 100% the same.)
That said, you don't need any filters on your lenses in general, only if you want or need a certain effect they create (CPL filters to see through reflective surfaces like water or to strengthen the saturation of some colors, ND filters to expand your exposure time (either to capture motion in a different way, or to use a lens with wide open aperture in full sunlight where you would otherwise max out with your possible exposure time, IR filters to use a different span of light