To my eyes – and I have not done any scientific tests to confirm it – the Sony A7R has the best dynamic range of any camera that I have used. While I loved my Canon 5d2 (sold) for its “will never fail me, no matter what the circumstance” character and still love the Olympus OM-D EM-5 for its versatility, none of them yield RAW files that have the same malleability. Combine this with the sharpness of the Leica 35 Summilux and you have a cracker of a walkabout combination. It’s light and has stunning resolution!
Take this photo for example. The amount of detail I managed to recover from the highlight and the amount I have been able to push the deep shadows is just incredible. This was a strongly backlight seen and all the faces were rendered in deep shadow. Yet, after some minor Lightroom work, the photo is nicely balanced, with great color and contrast and very little noise.