Thanks guys for your responce regarding filter use, your answers wre closer to my thinking. I am using a Nikon clear filter and occasionally a Hoya pro1 CP.
I was very happy using mostly a nikon 16-85 vr that is one of the top rated zoom by Photozone, but my two zeiss are not only sharper but produce purer color hues and tonality that gives a sense of reality in an image.
