Shapes
Shapes—circles, squares, triangles, etc.—are easy to identify, and when used as compositional elements they can create simple but very pleasing images. We can find shapes in nature as well as man-made objects. In Figure 4.10, the famous Vatican museum stairwell demonstrates a classic seashell spiral otherwise known as a logarithmic spiral (Figure 4.11). Many architectural structures borrow their shape from naturally occurring forms.
Figure 4.10 The spiral staircase shares the same form as a spiral seashell.
ISO 400 • 1/4 sec. • f/11 • 15mm lens
Figure 4.11 The logarithmic spiral is a great example of a leading line that defines a shape.