Here’s an interesting item, from artist Sascha Pohflepp. It’s called Blinks and Buttons, and it’s a “blind camera.” Possessing no lens and no viewfinder, the “camera” still takes a picture when you press the big red shutter button.
What it does is tracks the exact time that the button was pushed, and then goes out and searches for another image taken at that exact time. Once the camera finds one, it displays the image in the LCD on the back of the camera. Sascha’s “Buttons” are part of a larger art project called “Blinks and Buttons.”