Thought this was a really good web site below that covers all the Nikon LF lens specs and wanted to share. Now I know that the 90mm F 4.5 SW I bought and is shipping over now has a filter size of 82. 
http://www.kennethleegallery.com/pdf/Nikkor_LargeFormatLenses.pdf
http://www.kennethleegallery.com/pdf/Nikkor_LargeFormatLenses.pdf
