I've had my T3 for almost 2 years and last year, I sent it to Canon to get some part cleaned (something got into the camera while I was changing lenses). When I got it back, I noticed that it was hard to focus when looking through the viewfinder. Objects I want to focus on get less blurry than the rest of the view, but are never in sharp, clear focus, like it's supposed to be, although the images turn out the way I want them to when I review them. It doesn't matter which lens I use or if it's AF or MF. Looking through the live view, however, is perfectly fine. Would this be possible to correct without sending it back to the shop (since the problem only started when I got my camera back from them)?