You learn something new everyday

During a quiet period at the forum the other day, Gilbert was playing with my camera and asked "what happens if you take take a photo with the lens off?"

This is the answer:

The forum's stage with no lens.

Now for the science bit:

The camera lens works just like the lens on our eyes, including inverting the image once it has been focused. The Photo sensor in the camera collects the parts of the image together and compiles it into a single image.

Here endeth the lesson, class dismissed!