An anamorphic lens assembly for a camera, the anamorphic lens assembly comprising:
- a first anamorphic lens component comprising:
- a first cylindrical lens element having a first cylindrical curvature about a first axis and a first cylindrical optical power at infinity focus;
- and
- a second cylindrical lens element having a second cylindrical curvature about a second axis and a second cylindrical optical power at infinity focus;
- wherein the first and second cylindrical lens elements have a combined cylindrical optical power at infinity focus;
- and
- wherein the first anamorphic lens component has a first astigmatism at infinity focus and a second astigmatism at close focus, and the first astigmatism is greater than the second astigmatism;
- and
- a second anamorphic lens component comprising:
- a third cylindrical lens element having a third cylindrical curvature about a third axis and a third cylindrical optical power equal to half the combined cylindrical optical power of the first and second cylindrical lens elements, the third cylindrical optical power having opposite sign relative to the combined cylindrical optical power of the first and second cylindrical lens elements;
- and
- a fourth cylindrical lens element having a fourth cylindrical curvature about a fourth axis and a fourth cylindrical optical power equal to half the combined cylindrical optical power of the first and second cylindrical lens elements, the fourth cylindrical optical power having opposite sign relative to the combined cylindrical optical power of the first and second cylindrical lens elements;
- wherein the third and fourth axes are parallel and oriented vertically when the anamorphic lens assembly is in an infinity-focus configuration, and the third and fourth axes are oriented at a non-zero angle with respect to one another when the anamorphic lens assembly is in a close-focus configuration;
- wherein the third and fourth cylindrical lens elements are rotatable in opposite directions with respect to one another about an optical axis of the anamorphic lens assembly as the anamorphic lens assembly transitions from the infinity-focus configuration toward the close-focus configuration;
- wherein the second anamorphic lens component has a third astigmatism in the infinity-focus configuration and a fourth astigmatism in the close-focus configuration, and the third astigmatism is greater than the fourth astigmatism;
- wherein the third and fourth cylindrical lens elements in combination have a fifth cylindrical optical power in the infinity-focus configuration and a sixth cylindrical optical power in the close-focus configuration, and the fifth cylindrical optical power is greater than the sixth cylindrical optical power;
- and
- wherein the third and fourth cylindrical lens elements in combination have no spherical optical power in the infinity-focus configuration and a non-zero spherical optical power in the close-focus configuration.