According to The Digital Picture, the Canon 5D Mk II and 7D are subject to an optional hardware upgrade.
The full-frame 5D Mk II is still a hot-selling HDSLR, but the interwebs have been abuzz with speculation about what the potential successor will be like. Everything from RAW HD video, 4K video output, wireless flash control, much faster burst rate, to 39MP have been rumored. What features would be on your wish list? When will it come out? We'd love for you to share your thoughts in the comments below.