Filters for Digital Cameras
You still need grad neutral density and polarizers, same as with film explained in paragraphs below. These effects cannot be duplicated electronically. nik multimedia's color efx pro is the best way to simulate these looks if you forgot to use the filter when you made the shot.
You may skip the color conversion filters like 80A, FLD and 85C, since you get these by adjusting the camera's white balance. This is an advantage of digital, since you don't lose the stop or two of light that these filters absorb. Since you are often in dim light when using these filters this is a huge help!
You also can replace mild, fine tuning warming and cooling filters like my favorite 81A by fine tuning the white balance adjustment. Personally I still use an 81A filter all the time on my digital camera lenses so I can swap these to my film cameras without having to twiddle with filters. Otherwise just adjust the fine tunes of your WB presets to get this. Not all cameras can adjust the presets, and now you see why this is so important.
