Pinhole camera - Wikipedia

File:Nature's pinhole camera (solar eclipse).jpg - Wikimedia Commons

History of the Camera: When was Photography Invented? - Adorama

File:Pinhole-camera-image-formation DE.svg - Wikimedia Commons

How to make pinhole camera?

Gorgeous Camera Obscura Time-Lapse Footage of Paris - The Atlantic

15-463: Computational Photography

Fisheye lens - Wikipedia

File:Homemade pinhole camera.JPG - Wikipedia

Camera Calibration. Camera Geometry and The Pinhole Model, by Ms Aerin

How to Make a Pinhole Camera (with Pictures) - wikiHow