Partinen tweeted early Friday morning that today would be his last day with Nokia and that he would "start a new chapter in Cupertino." He confirmed shortly thereafter he was talking about Apple.
Nokia has referred to Partinen as its resident camera expert. His LinkedIn profile notes he has "worked with mobile imaging starting from camera module production all the way to the final image quality tuning and verification." Partinen has worked on the Nokia 808 PureView and Nokia N8 projects.
The stock was down 1.37% to $7.20 at 11:02 a.m.