I have this lens. A couple of things. The lens is made for cropped sensors. Period. The hood is not removable, nor does it need to be on a cropped sensor. The focus scale may have to be recalibrated by loosening a couple of tiny screws under the rubber grip. It is a fantastic fisheye, and a huge bargain. Fisheyes are very specialized, and this is a great way to try one out. The apertures are click stopped, so not good for video. There is a de clicked model available. I paid $150 for mine about eight months ago from a big ebay seller. Forget which one, but it's one that is always selling the Canon 24-105 for $600.