This fault/defect is strange enough:-http://forum.xitek.com/showthread.php?threadid=918700(in Chinese, Google English Translation Here)As it can be clearly seen, oil is leaked inside the lens and thus caused fogging. That's it:-The Pentax user also mentioned that he opted to send in his K-r together with the DA70, of which the repair is mandatory, for "calibrating" his body for the yellow-light
