I have an 10 year old camera (Canon 400D) and primarily use a fixed Canon 1.8 50mm lens. This weekend I was using it and noticed most of my photos with that lens looking blurry and unfocused. Over this weekend I also used other lenses (Canon 10-18mm) and the photos shot with them look sharp.
I've had a growing suspicion something is wrong with the 50mm AF as lately, the focus have felt "thrown off" despite me taking care to focus at the right object (I almost always use the centre point). It hasn't been as disastrous as this weekend though. I've had this lens for 5+ years, and I've taken great, sharp photos in the past so I don't think it's all in my head.
However, some photos from this weekend are still sharp.
Can someone help me out - although I'm enthusiastic about photography, I'm not an expert of how the lens and camera work "under the hood". Is it common that a lens will lose its AF capabilities over time?
(I'd rather not post the photos I took, as they have people in them and I value their privacy)