But when the students' work is displayed on the last day, it makes no difference as you can't tell which camera produced which result.

But the cameras are producing family tension, of a sort.

Under certain lighting conditions the back camera produces a large green 'halo' in the center of the image.

Galileo's camera produced strong clues that he was probably right.

The camera, available for $75 from major retailers, produces 640-by-480-pixel photos that are small and fuzzy.

These inexpensive cameras produce pictures of such quality that on first try, most amateurs cannot believe their eyes.

An instant camera produces a picture within seconds, while conventional film needs processing.

However, the camera is closer to the ball, producing a faster action.

What has become clear is that the cameras produce two things in abundance: fines and lawsuits.

The two wide-angle cameras can produce a complete color image of the entire planet every day.