What am I looking at?
Depth of field wedge
The zone of acceptable sharpness
The zone of acceptable sharpness
Plane of sharp focus
Tilts when you tilt the lens
Tilts when you tilt the lens
Lens cone / angle of view
What your camera sees through the lens
What your camera sees through the lens
Ground line
Subject plane / ground level
Subject plane / ground level
Hinge point
Where the film plane extended meets the subject plane -- key to calculating tilt
Where the film plane extended meets the subject plane -- key to calculating tilt