I emailed Nikon Customer Support asking the manufacturer's number for the drop-in filter holder for my lens or in the alternative whether the holder for the VR would work in the mark II non-VR. That question overwhelmed them. I got an email saying they would have to work on that one. A week later, they replied they did not know either but gave me the model number of the drop-in polarizer. So I called. The young man could not grasp the difference between the holder and the filter. He did say that no holder was necessary as they have a screw-in filter for the front of the lens. I said that must cost a fortune and besides there is a protective filter up there anyway. This is no joke. He said they have the screw-in filter for the front of the lens in stock. I asked what it was and he said it was a 52mm NC filter. The young man will call me back. All this after an on-line chat that resulted in being told they cannot confirm either the number or whether the drop-in for the VR also fits my lens. Under the Repair forum I just posted my experience with a CLA for a 400mm f/2.8 lens at El Segundo.