Can't figure out the title. First let me say that this is a really nice shot. From an advertising pov, I'm not sure if you are highlighting the camera or the lens - confusing since they come from two diffeent companies.
Very good product shot - nice tight crop with even black background would allow copy/ad editors to add space if needed. Good even light. I like the cool reflection in the lens but I'm not sure if the ad guys would like that or not. They can always replace it pretty easily if needed. While it looks pretty sharp, it does look as though it could use one more round of sharpening, perhaps. Good work! (Commenting only.)
I really like this shot, but shame its not a canon lens (don't think canon would advertise a sigma lens). Like I said - nice shot though. Although you could be advertising a sigma lens! Good to see someone actually having a product. Nice.