The Nikon D5 sits atop Nikon’s DSLR roster as the company’s top-of-the-line camera for professional photographers. While the high-end Z7 is currently at the top of the Z series above the mid-level Z6, it’s not going to be Nikon’s top-of-the-line full-frame mirrorless camera for long. Nikon President Toshikazu Umatate confirmed the company’s plans to launch a higher-end camera in an interview with Nikkan Kogyo Shimbun, a Japanese manufacturing newspaper. Besides revealing that Nikon will be launching a flagship mirrorless camera…