Set a polarizing filter, hold the filter between your fingers while having the eye in the viewfinder. And it's always the risk of putting his fingers on the filter.
Now if this HD version offers a treatment resistant to fingerprints, this is not the case of Pro1D version that you can clean with a cotton cloth (cleaning products Prohibited for Pro1D ).
This important difference I chose without hesitation the HD version.
And of course, I enjoy the quality of the filter and multi-layer treatments that give outstanding images.