Fit Man!!!

Wee wif e and I are down in Montrose for a week making Son and his familys life a misery ( thats why I'm called Grumps) . He decided to go out for a run on his mountain bike and wanted some shots taken. This one was in a quite dark forest and has been considerably lightened in Photoshop. While I was out with the camera today my auto focus stopped working - with both my lenses so it cant be the lens motors - any ideas and/or advice friends??