Eek, I'm such an idiot D:

You know I mentioned dust on the sensor? Well, like an idiot, I tried to clean it off. And I scratched it.

Yeah. Idiot is an understatement. Thank goodness the scratch doesn't show on most photos, but still.

Ugh. I didn't know I could be that thick >.<

Depending on the lens, it shows with f/16+, f/8+ and f/5+...

But, again, it depends. Especially if the background isn't one solid colour, it's fine.