The articles introduction is in error. Thorium oxide was not used as a lens coating. Rather, the lens elements themselves were partially composed (up to 30%) of thorium oxide. Such lenses have properties not unlike calcium flouride elements used today.http://camerapedia.wikia.com/wiki/Radioactive_lenses
Karroly: K-mount and sensor-shift are big pros for "universal lens use".But lack of electronic viewfinder or socket for an additionnal one is a big con.Please, Pentax, design something else more ergonomic.Shooting arm stretched with such a camera and one of the big zooms shown in the picture above is just nonsense to me. But I am aware that some people need heavy, unstable gear to muscle their arms...My first mirrorless camera is a Samsung NX11 because it is yet the only one, as far as I know, with APS-C sensor and built-in viewfinder. And the more I use it the more I love it.And more: compared by myself to 2 Canon, 3 Pentax standard 18-55mm lenses on various Canon and Pentax bodies, the Samsung lens produces the sharpest shots @ 18mm F:3.5 with no chromatic aberration and near zero purple fringing in backlit situation ( and lens distortion correction setting to OFF in the camera menu...)
You mean to say that Pentax won't get it right for another three years??
I reckon I must be blind to that light you're talking about ;-)
I agree, Karroly - this camera seems, to me, to be seriously flawed. A mishmash of conflicting features: mirrorless, yet without many of the advantages that feature makes possible. Large, heavy, unable to use the smaller lenses the short back focus makes possible, and worse of all, the P&S viewfinder. Over the years, Pentax has produced many, many outstanding camera designs, but this is not one of them!