this is what i mean by the autofocus randomly not working, on pics 1 and 2. i made the camera run through autofocus a couple of times, made sure it was set to focus to infinity, and the camera reassured me it was in focus. this mess came out
other picture came out fine tho
when i took it apart yesterday i still didn't manage to get all the way down to the sensor, so it's possible the sensor is dirty or something like that. the marks on the camera body do suggest this might've been banged about a bit in the past