This post is a compilation of links to the following Sigma 150-500mm f/5-6.3 AF APO DG OS HSM Telephoto Zoom Lens (Nikon Mount) resources:
Sample photos and examples, image galleries and user pictures, movie / video clips and footage
Full-sized Sigma 150-500mm DG OS HSM Sample Photos at DC.Watch (Google’s English translation) — Tons and tons of full-resolution sample images in this article, featuring photos taken with the Nikon D700, D300 and D5000.
The most impressive photos, to me, are of the wildlife / animals / birds.
References and other resources
Official websites for the 150-500mm — Visit Sigma Corporation of America, where you can obtain the full list of features and specifications.