Read without your reading glasses

Here’s a neat trick for long-sighted readers that exploits the underlying concept of a pinhole camera to let you read in close-up even if you forgot your reading glasses. The video also explains what it is about a pinhole versus a fixed lens that allows it to project a sharp image of something at any distance and why depth-of-field is bigger with a smaller aperture (bigger f-stop) in your standard camera

Here’s the link for those of you whose smart phones cannot render the embedded Youtube clip ;-)