Here is my newest post and Tech Sheet.
Portable Lighting | LIGHTING ESSENTIALS : For Photographers:
"Tilt-shift lenses provide the small camera shooter with the functionality of a view camera. At least some of the functionality of a view camera. The front half anyway.
The ability of the camera to change the relationship between lens placement and film or sensor placement can provide many different possibilities. Two of the most popular are the tilt lens and the ability to shift the lens above and below the sensor axis.
Let’s examine the tilt tool on the Tilt Shift lens. Tilting helps control the Depth of Field on images. By tilting the lens forward, the photographer can manipulate the amount of focus by increasing
the angle of the lens’ DOF."