I've been on the hunt for a pocket camera to complement my DSLR, and spent time with cameras with sensors ranging from micro 4/3 to full-frame. My test of Sony's RX100 Mark II made me seriously consider the trade off between body size and sensor size. There were several things that held it back from being ideal for my day to day use, but I realized that getting a compact camera with an APS-C or Full-Frame sensor would compete too directly with my DSLR. Going for portability made more sense for a secondary camera. So for my recent birthday, I ended up buying Sony's RX100 Mark III, based on the praise other photographers have given it. It arrived a little over a week ago, and I've been shooting a lot with it since. And even though I've already committed to the camera, I'm still running it through the practical testing that I would give any new camera to gauge its strengths and weakness, and to relay that experience to you. So here's what that shooting experience has been like so far.
One of the reasons I felt I would be comfortable buying the RX100 III before using it is because it inherits almost all of the great things I like about the RX100 II. That includes size, weight, tilting LCD, image quality, manual controls, and wi-fi features. The size and weight are perfect for these cameras to be stowed in a jacket pocket (though the MK III is slightly thicker and heavier than both previous models). I was already satisfied with the RAW and JPEG image quality from Sony's 20MP 1" -type sensor, even if the lens on the MK II was a little lacking. And I have been very impressed with the Wi-Fi connectivity of Sony's cameras, which I used extensively on the a7 and RX100 II. In using this 3rd-generation RX100 the things I wanted to specifically test for were the new zoom lens and autofocus speed, as well as the digital viewfinder.
The OLED viewfinder is probably the most noticeable addition to the RX100 line, and surprisingly doesn't add to the heft or bulk of the camera. There's still a built-in flash, and the only thing you lose is a hotshoe that was on the MK II. This EVF pops up on the left side and needs to be extended a little bit before use, so you can't switch to it as instantaneously as you would a fixed EVF like on the Fuji cameras. The eye proximity sensor has proven to be accurate, though. I found the 800x600 resolution (100% coverage, .59x magnification) sufficient for framing and focusing, since I use digital peaking assists anyway for finding focus. I know some people who only use EVFs for their shooting, but I typically can't stand the latency--my brain wants the response of an optical viewfinder. But I have been using the EVF on this MKIII outdoors and even for reviewing photos. If Sony offered a version of the MK III without the EVF for a lower price, I would've gone with that one. But the $150 price difference between the models accounts for the EVF, the new lens, and new processor.
Below are my sample photos taken so far, with notes on what they say about the camera. The photos were not post-processed at all, just RAW files ingested in Lightroom and resized/exported as JPEGs. Click each of them to enlarge.