Tutorials, Instagram filters are called Tilt-Shift. The obsolete result makes the specialists smile.
Discovery without filter of one of the most noble techniques of optics.
The previous subject "Large format photography" showed the possibilities brought by the movement of large format cameras used before digital by studio or architectural photographers. Shift the lens to control perspective and tilt the lens axis to control sharpness.
Canon had developed a range of tilt-shift lenses.
Here is an illustrated presentation of this technique and more precisely of the scale and its diverted use for an artistic creation.