Camera Obscura (from latin: “Dark Room”) can be thought of as an an...

Jean-Auguste-Dominique Ingres was a 19th century French Neoclassica...

### Normal Lens A scene viewed through a normal lens appears to ha...

### Focal Length The main purpose of a convex lens is to take pa...

### Estimating focal length First the authors estimated the angl...

Depth of Field decreases as you increase aperture: ![](https://i....

As stated, lenses can be focused perfectly at **only one** distance...

Gaussian Lens Equation: ![](https://d2vlcm61l7u1fs.cloudfront.net/...

Demonstration of moving vanishing point: ![](https://i.imgur.com/v...

Detail of the convex mirror pictured in Jan Van Eyck’s Arnolfini Po...

Spherical aberration is an optical problem that occurs when incomin...

Pattern in question ([full res](https://i.imgur.com/c58nRem.jpg)): ...

A diopter is a unit of measurement of the “optical power” of a lens...

Pattern in question ([full res](https://i.imgur.com/e9oILh4.jpg)): ...

Hans Holbein Georg Gisze ([full res](https://i.imgur.com/CT7ov1C.jp...