Recently, some different Pentax users, who had got the new DA Star lenses for their K10D, have reported that they found that more AF errors were resulted when the SDM lenses were used on their K10D, i.e., by enabling the SDM function to do AF ultrasonically. Just see the following hot thread:-http://forums.dpreview.com/forums/read.asp?forum=1036&message=24652706As we can see, the logic of the
