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|Tilt-Shift Lenses and DOF in Subject photography|
|Written by Peleng|
Many photographers have difficulty with Tilt-Shift lenses, not understanding how it works and now to use tilt-shilt lenses.
Here is the object, shot at f/2.8 without tilt, with a focus on the nearest corner. We see that the DOF is no more than 1 cm:
If you downward tilt the optical axis, the plane of focus will be parallel to the surface of the cube and upper face will be sharp ,while DOF will decrease up and down:
In general, the rules of shifts can be stated as follows:
The front lens element must tilted to the photographed areaís slope.
When you change the focus distance of tilt-shift lens DOF moves up or down. This is illustrated in follow animationt:
Modern cameras have a live view mode. No needed to calculate slopes. 2x zoom will show you DOF so you need just to make some correctives remember about rule above.