I just purchased a new Sony RX100 Mark III model to replaced my 2 year old original RX100. Although the new camera’s sensor is exactly the same as the old one’s, there were three principal reasons for getting the new model:

• The Mark III has an electronic viewfinder (EVF) — I found it very difficult to see a scene and the camera’s settings on the previous camera’s LCD screen, especially in bright light; I am finding that the Mark III’s EVF is a huge improvement;
• The Mark III’s lens goes down to a 24mm wide-angle equivalent; I found the previous camera’s 28mm to be a bit constraining;
• The Mark III has much improved menus and extended parameter settings; especially useful is a greatly increased range of exposure bracketing choices.

I am again mounting a Lensmate filter adapter on the camera so that I can use polarizing and ND filters (although the Mark III has a built-in 3 stop ND capability). After using the new camera on last weekend’s Broken Top hike, I have decided to take it on our upcoming Portugal and France trip (in lieu of my Canon 5D Mark III SLR camera and lenses).