I use a Nikon 500mm F4 ED-EF II lens in conjunction with either a D2Hs\nor D2H body and find it absolutely useless for any wildlife\nphotography in motion. It is barely adequate for sports.\n\nIt is quite incapable of tracking any bird in flight and is constantly\njumping in and out of focus. And it will not autofocus with any\nteleconverter.\n\nThe same applies to my Nikon 80-200mm F2.8 zoom (converters are OK but\nslow)\n\nI am seriously considering changing to a Canon system, i.e. EOS 1d II\nor III and a 500mm IS lens, despite the crazy white colour (for\nwildlife photography anyway)\n\nCan anyone tell me if Canon lenses are any better at autofocus\ntracking, faster, and do work with teleconverters?\n\nI'm a professional press photographer using Nikon gear for over 40\nyears so I have a fair idea of camera equipment. But this lot is\ndriving me crazy, with so many missed shots. I would be better off\nwith my ancient 600mm F5.6 manual focus lens.\n\nI have sent the 500 lens away for checking and even through the repair\nman couldn't find anything wrong, he did suggest that I might need a\nnew motor!