Firmware is software, not hardware, which means it can be upgraded, which means that if you DO upgrade it, and the number on the back is actually the firmware, the marking on the unit unit will be faulty. So, no. F100 is the real name of it. Just like Fuji's cameras are called F10, S9500 and so on. Since your unit was produced last year, I'm pretty sure it's a Mark 1.