Pentax K-01 Digital Camera Review$899.95
Chromatic aberration is visible in the extreme edges and corners of the frame (as shown in the chart below), but nowhere else. Prime lenses with a fixed zoom ratio often boast this advantage, and this 40mm kit lens is no different. The K-01 is equipped with chromatic aberration correction, however we did not find this feature to be effective.
Distortion isn't too bad. We detected about 0.74% barrel distortion is our resolution test, but this number can be brought down to 0% by activating the K-01's distortion correction feature. Both distortion correction and chromatic aberration correction add extra processing to each shot, so this will slow down continuous burst shooting. For this reason, we left both features off most of the time.