Let's talk tangents
El reporter i fotograf Mark M. Hancockens parla en el seu bloc de les tangents i la seva importància en la composició fotogràfica:
'The word tangent comes from a Latin word tangens. It means "to touch." Although tangent has precise mathematical meanings in both geometry and calculus, we'll stick with the original definition and apply it to the visual geometry of images.
Mathematically, a "tangent point" is the location where a line intersects with an arc. Although the mathematical definition applies to a single line and a single arc, PJs must herd cats into a single frame and might have several arcs and lines within the same frame. Any of these intersections may create unwanted or avoidable tangents.
How PJs define tangent
Most tangents occur with a line and an arc. For practical PJ applications, any part of a defined geometric shape (or entire image element) intersecting another geometric shape is considered a tangent.
There are two significant ways we apply the word tangent when we shoot and critique images. The first is held within the....'
Per altra banda, podeu veure un exercici interessant fet per alumnes d'un altre institut:
extret d'un altre bloc de plàstica, plàstica en el Àfrica
