Our photographers recommended Wu ke Song market.

http://www.bjphoto.com.cn/

Get off the subway at Wu ke song station, and take 982 or 913 bus to Ding hui qiao nan/ 定慧桥南.

There's also a very professional camera equipment store by the National Art Museum of China. Can't remember its name, but if you head east of the gallery's main entrance and turn north at the first intersection (Meishuguan Dongjie) and then turn into the second small street on your right - it's just past the entrance to the Sanlian Bookstore.

I tried Ray! Camera in Soho Newtown and it was the worst camera shopping experience I ever had (and I was dressed decently!). The salesman wasn't at all knowledgeable and seemed pretty bored with it all. Prices were pretty much around the manufacturer's suggested price and equipment was very limited. In contrast, the salesman in the shop I finally decided to buy my equipment at camera city in Wu Ke Song, was knowledgable, eager to make a sale with some negotiation, carried an inventory of cameras and accessories that was very extensive. I did a lot of comparison shopping there and found some major differences in pricing. So, it pays to be cautious. By the way, there isn't much price elasticity with high-end camera bodies. The differences from dealer to dealer were what you could get the shop to 'throw in" as an enticement (like a camera bag, lens hood, extra battery, etc)for you to buy from them.