mosc: I think the RX10 is overpriced. The lens is great but in a few years it can't be used with a newer 1" sony sensor that offers new things like 4k video or real action tracking on-chip PDAF. If they make an RX20 one day, you'll have to re-buy the lens. Maybe it'll be a little longer at tele or a little lighter but your old glass is throw away. Usually, fixed glass comes at a discount. No mount to deal with, the lens can have fewer compromises, saves money. That makes up for it. This one doesn't seem to have that.
You can't find 1" lenses that compete with this but there are plenty of APS-C sized lenses that do. The article lists a couple, the EF-S 18-135 and the very impressive sony E 18-105. There's also the 18-200 sigma that just came out which is under a pound and has 11x instead of 8x range and usable macro. The dimensions of the RX10 isn't revolutionary either compared to one of those lenses attached to a small camera. Several combos come out LIGHTER than the RX10, all are CHEAPER.
RX10 is a black horse, as was R1 at 2005. R2 never came out (who knows the reasons?), so maybe there never will be RX20 as well. At the end, RX10 seems a nice tool (as was R1 despite heavy criticism about the sensor "aging" since the lens was not detachable (but what a great lens)), so kudos to Sony for its braveness to come to the market with something completely different.
ZAnton: Samsung... good in a digital technologies, but total loosers in optics.
ZAnton - you should consider re-investigating your opinion about optics, try the NX primes which are really sweet lens.
Samsung has some excellent primes out there with a reasonable price tag - 30/2, 85/1.4, 16/2.4, etc; many NX system users were missing the "bright" (usually considered /2.8) standard zoom - here we go with not only F/2.8, but /2.0 at the wider end. And the funky viewfinder of NX30 - whoa! Neat stuff! Considering the background of the company (deep pockets + superb electronics), I guess Nikon/Pana/Oly engineers can't have much of rest this year to keep up!
Wow, 100+ comments so far, seems a popular unit. Have been using this for more than five months now (first rented for test,,) For me the main reason is the excellent sharpness at F/2.8 @ 70mm.
Vibration Control works fine with videos, does not work fine with fps shooting (I guess the stabilizer has no time to find a "stable" position between shots). Since the FF body is heavy and stable, as well as my hands, the VC is always turned off (except videos). At a positive size, VC works fine at single shot mode (so no continuous).
CA sometimes a problem at corners with high contrast (direct sunlight), even at F/9. Depends on certain situation (angle, subject) though.
Corners are softer than on Canon 24-70 /2.8.
AF is silent, smooth, fast, accurate - could not dream of better.
Glass is so good that it outperforms 21mpix easily. Would like to hear from Nikon D800 users - has anyone had a chance to test this lens with 38mpix?
Other than that, the lens is a real honey.