Optics

Here is a diagram to visualise how optics relate to each other:

Optic Composition Table

Almost all optics compose with the other optics. The composition of one type and itself results in the same type of optic.

	Fold	Getter	Setter	Traversal	Optional	Prism	Lens	Iso
Fold	Fold	Fold	Fold	Fold	Fold	Fold	Fold	Fold
Getter	Fold	Getter	-	Fold	Fold	Fold	Getter	Getter
Setter	-	-	Setter	Setter	Setter	Setter	Setter	Setter
Traversal	Fold	Fold	Setter	Traversal	Traversal	Traversal	Traversal	Traversal
Optional	Fold	Fold	Setter	Traversal	Optional	Optional	Optional	Optional
Prism	Fold	Fold	Setter	Traversal	Optional	Prism	Optional	Prism
Lens	Fold	Getter	Setter	Traversal	Optional	Optional	Lens	Lens
Iso	Fold	Getter	Setter	Traversal	Optional	Prism	Lens	Iso