Purchased the Sigma 150-500mm OS AF APO DG HSM lens for a Canon 30D camera. The lens has everything you need shipped with it, the carrying case, lens strap and sun hood, you need to purchase the 86mm UV filter separate. The lens attaches to the camera body as easy as all other Canon lens. The auto focusing and zoom has been great for some wild life photos, such as the deer's. The stabilizer is great, but could consume a lot of the camera battery.
This lens is of decent build and quality. For my 7D crop sensor camera the widest viewing angle (diagonal) is 167 degrees, which means that for full panoramas I have to shoot more frames. I did shoot photos with this lens and also Sigma 8mm. With cost of only 27% of Sigma it is delivering good quality images. The only thing is the lack of AF (not a big deal for a fish eye lens). As far as my experience with Overstock goes, it went very smooth, very reasonable price, prompt delivery.
Sigma lenses have proven to be excellent choices for me since my first (of now 4) lense. Pleasing photograph results has netted my confidence and trust in the name. Certainly a bargain investment in my unprofessional opinion.
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