It turns out that the Sony DSC-RX100 III is a significant upgrade from the first version of this camera. Here are the big new features:
- 24mm wide angle instead of 28mm
- pop-up/out eyelevel viewfinder for use in bright sun
- articulating rear LCD (great for tall old people taking pictures of short young people)
Battery capacity was barely dented over 1.5 days and 227 images plus two short videos captured.