This Canon EF-M 18-55 IS STM is the best 18-55mm lens I've tested for Canon. This makes perfect sense because the EF-M format allows the lens designers the freedom to place the rear elements much closer to the sensor than the EF-S lenses which have to be designed around avoiding the flipping mirror of DSLRs I'm sort of ashamed on Sony's part, but the Sony DT 18-55mm SAM and Sony NEX E 18-55mm OSS are poor by comparison. The Sony lenses are much softer and more distorted. Canon doesn't screw around when it comes to lenses; Canon is an optical company first and foremost, not a stereo equipment company like Sony.
The EF-M 18-55mm IS STM has much more than the usual amount of ghosts if you push your luck shooting into the sun and putting dark things in place to see the ghosts, and giving enough exposure. It is much worse than the 22mm f/2 STM.
Manual focus is awful; don't bother trying to use the manual focus ring. The ring is merely an input to a computer, which in turn controls the lens motor — if you have everything else set properly. It only works if the camera is both on and awake. There is little direct relationship between the motion of the ring and the motion of the lens, and there is some time delay.
No longer the stuff of rumors, here's the E-M5 straight from the horse's mouth:
P.S The new, Serious and more business conscious Ken Rockwell appears to have changed the wording, the context, heck, everything in his review of this camera. It is no longer "less responsive than his kids toys", and not worse of all Nikon DSLRs ever made. It (the Canon EOS 5D Mark II) is now better than any Nikon at almost everything, and overall, one of the best cameras ever made. Go figure. Quote of his old review, and our comment at the bottom of this post. . . . read more
We saw leaked pictures of these two yesterday, now we get the rest of the story too. The original lenses replaced by these new primes are some of the oldest in the Canon line-up, hailing from the 80ies. So, what's todays target market? The typical professional shooter is nowadays more or less forced to go with a zoom (like a 16-35mm f/2.8 or the new 24-70mm f/2.8) or some L primes for a variety of reasons. Similar high quality zooms and much cheaper primes are available to amateur shooters as well. I suppose Canon is well aware of these facts and chooses to release the new primes for the left over niche market as well as for historical reasons. . . . read more