Selling my Sigma 800mm for Nikon due to lack of use and time for birding. Can come with a Nikon D7000 if desired.
Nikon mount, 800mm, f/5.6 EX APO DG HSMEX=The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearanceAPO=In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberrationDG=for full frame camerasHSM=Hyper-sonic autofocus motor
mfg link :?http://www.sigmaphoto.com/lenses/telephoto-lenses/800mm-f5-6-ex-apo-dg-hsm
great write up about this lens from a bird photog:http://www.billmajoros.com/photoalbum/categories/new/Sigmonster/mac.html
Nikon D7000, 16mp, DX (not full frame), after market battery gripmfg link:?http://www.nikonusa.com/en/nikon-products/product-archive/dslr-cameras/d7000.html
800mm lens $4500D7000 $500
contact me at olyvtx at yahoo.com