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I did some tests today as I have been getting some poor focus at 70mm on my 24-70FE I mainly do landscapes but play around with some portraits and wildlife when I get the chance, but recently a bird shot came out tack sharp on my partners RX100 and my carefully manually focussed shots on my A7r 24-70FE at 70mm were not tack sharp at all. I since realised I should have increased ISO to get the shutter speed up to at least 1/250, some of my poor shots were at ISO 100 1/45 To further explore I mounted both cameras on a trpod at home today to photo this lamp and can conclude the RX100 is deffinitily sharper at 70mm, (approx 70mm equavellent as the RX100 is supposed to be a 28-100 equivelent focus lens, exif reads 37mm but it was near full focus length) I just cant get a tack sharp image from the 24/70 at 70mm? I used remore trigger mounted on a stirdy tripod Increased ISO to get faster SS Used remote release Manually focussed maticulously (the image did become tack shap in the viewfinder but not the raw output file viewed in lightroom)I tried with both image stabilisation on and off, both images were identical(I recon its a myth by the way that image SS on or off on a tripod monted A7r is any different, please reply if you have found there is a difference)Tried mounting weight on the lens in case shutter shake was effecting at 1/200 but interestingly this blurred the picture This is really disappointing, I don't want to fork out for an 85mm prime for portraits and I can't carry that around on my landscape hikes in case I encounter wildlife, I really hoped the 24-70 would do a better basic job than this, especially compared to a camera with a tiny sensor, the rx100 is a great little camera but it's disappointing that a $400 camera beats about $3,500 worth of kit for the A7r & 24-70FE. See below images, all from RAW files with minimal development, 3:1 zoom in Lightroom, the first one is the best of about 8 I took. A7r 24-70FE 70mm F4 1/250 ISO 1000 not sharp at all? RX100 Approx 70mm Equivelent, 1/100 F4.5 ISO800, tack sharp So I tried the 24-70 FE @ 55mm F8 ISO 3200 and it improved a lot, its close to the Rx100 now, but thats the Rx100 at f4.5 70mm so that may not be an equal comparison, I still think there is more detail on the Rx100 but its close, ISO noise is stronger on the RX100 so I am unsure which is best. There is a strong red hue from the A7r? I guess thats the Auto White Balance many give out about, interesting any feedback on the red hue as I have that on all my photos, does not seem right, is this the auto white balance? I could swear its there when I select white balance in camera myself.