Looks good to me!  Better than I could do.

I think it will be OK for a sales ad,  but it does have a little bit of a dark and gloomy feel to it.  I actually prefer the white background for things like this.  I think the "light and bright" approach, displays better, so I flood them with light.  I wouldn't be afraid to get a little closer (or crop closer) to put more emphasis on the camera itself.  People love to see what they are buying.  

And here is my tip of the day.  Take the time to really clean the dust off before you do product photography.  Or it will end up looking like this.  
I thought I got most of it, but missed the area between the lens and hot shoe, and it's time consuming to photoshop out.

Dust can be a real PITA, even more so with black subjects. When I was doing the firearms product photography thing, I would keep shop air handy to blow things clean, as well as a small 1" paint brush very lightly coated with CLP to brush/dust things off.

Looks solid. Only nit I can pick is to my eye a little too much contrast and sharpening but that very well could be my screen.

Should do the job nicely.

I have been doing a lot of product/table top stuff lately and working on getting better at it. There is a lot more to it than what most would think.

There is cool series on Youtube about table top/product photography by Don Giannatti.

https://www.youtube.com/watch?v=Q6ReM7dhZkc

This is a really nice video on shooting a liquor bottle with multiple light set ups and then compositing in post. Overkill for selling something on line but a pretty cool look at high end product photography.

https://www.youtube.com/watch?v=oqa9pbsTJQ0