Pentax has just announced two new cameras, the K-5 II and K-5 IIs without the AA filter. They both closely resemble much appraised K-5 and earlier K-7 models; all the changes are under the hood. Just like Nikon did with D800E, Pentax decided to release a version of the camera without anti aliasing filter. In theory, pictures will become shaper with more details recorded, but with the downside of possible moiré artifacts. In real life testing, Nikon D800E delivered sharper photographs only when paired to high end lenses and at certain aperture settings, so it is yet to be shown to what extent the new Pentax will be able to utilize its lack of low pass filter.