I went out to a CFL game tonight and brought my camera for the first time. I brought the EM-5 with the 40-150mm. About 10 minutes in I started having trouble with the auto focus at the longer focal lengths. Then I realized that it also wouldn't manually focus at the longer focal lengths. I can only assume that there is something wrong with the lens. I got the lens from Olympus over a year ago, new , when they had it on for $100. If I send it in is the repair going to cost more than the lens is worth? Could it be anything but a lens problem?