There is the http://www.mir.com.my/rb/photograph...es/zoomsMF/Sigma3501200APO/sigma3501200mm.htm
or the http://www.mir.com.my/rb/photography/companies/nikon/nikkoresources/zoomsMF/12001700mm.htm
for those wanting ultimate reach at any cost.
That's because Nikon doesn't know what real reach is. THIS it real reach:

