For wildlife and sports, I personally have used a Tamron 300/2.8 lens for a couple of years... I have also used the Nikon 300/2.8AF-S and as far as optical quality like contrast and resolution, I have not been able to see any significant differences. Of course, my Tamron lens is manual focus, so there is that difference... They sell for around $1870 or so from B&H. Any one interested in perhaps purchasing this Tamron lens used from me should email me... privately... [EMAIL PROTECTED] I would not recommend using any zooms in this range due to aberrations and slow speed of the lens... shake is a difficult issue for long lenses even with a reasonable tripod unless shutter speeds are fast enough... the 2.8 lens allows me even to (infrequently) handhold the lens on sunny days for sports, although I would usually use a monopod for sports and a tripod for wildlife... Paul Silver Paul Silver Photography http://www.silver-light.com Photography for Architecture, Sports, Theatrical Commercial Stock and Fine Art visit my portfolio http://www.silver-light.com/portfolio/
