While taking some shots today, I ran into a problem that I also had earlier in the week... on just some of the pictures, the quality completely dies, while other shots are sharp and really nice. Here's one example:
US Airways Airbus
Also, there's a black speck in the middle of the shot... I can't tell why it's there, since I've seen it with two lenses, and I thought I wiped the camera's mirror, as well. Depending on the focus, it becomes stronger or weaker, so I think it's somewhere on the camera... any ideas where to look?
Hopefully in the next few days I'll be able to show some of the better shots from the day