An Unlikely Intruder: The Fly Inside a Professional Canon Lens
What seems like it could have been an April Fools joke if it had come out a few days sooner, the Lensrentals blog has posted a great (and enlightening) story on something that apparently has happened more than once: somehow, for some reason, a full-sized fly got into a lens, and the entire lens had to be disassembled to remove it. The question is: did it affect image quality?