There's a sense that, for all the usual launch hyperbole, Sony didn't quite realize what a hit it would have with the original Cyber-shot RX100; that's not a mistake it's making second time around.

Last year, Sony overhauled basically its entire line of cameras from the very bottom to tippiest top. Surprisingly, the most exciting of the bunch weren’t mirrorless cameras or DSLRs, but a novel pair ...