Just thought I would post this for other Nikon shooters that are wishing for a 400/5.6 AFS lens. I inquired of Sigma whether they would be producing an HSM version of their 400/5.6 AF lens. Here is their response: >>>>>>>>>>>>>>>>> Dear Sir: Unfortunately, there are no current plans for making a 400mm lens with the HSM motor for Nikon camera systems. If, however the lens becomes available, we will be sure to contact you. Sincerely, Sigma Corporation of America 15 Fleetwood Court Ronkonkoma, NY 11779 (516) 585-1144 (516 585-1895 - fax >>>>>>>>>>>>>>>>>>>>>>>>>
