CANON EF MOUNT
I bought this lens and used it a few times and now hardly at all. It has seen very little usage. All packaging is original so it will (almost) feel like unboxing a new lens. Lens case and both hoods are included as well as tripod collar. For those of you who like lens testing and stats and numbers and what not, check out this review on it.
http://www.photozone.de/canon_eos_ff/667-sigma150f28oseos