Abstract: A focal reducer for use with a camera and a primary lens moves the image formed by the primary lens farther back within the lens/reducer/camera assembly so that the image of an object within the field of view is formed at the image plane of the camera. Relaying the image from the image plane of the primary lens to the image plane of the camera enables the primary lens and the camera, which have the same type of mount, to be used with a focal reducer. Previously, a primary lens and a camera having the same type of mount could not be used with a focal reducer, because the focal reducer interposed between the primary lens and the camera caused the image plane of the primary lens to be located in front of the image plane of the camera, making it impossible for the lens/reducer/camera assembly to achieve infinity focus.

Abstract: Anamorphic lens assembly having first and second anamorphic lens components, each having an astigmatism at infinity focus that is greater than an astigmatism at close focus. As the anamorphic lens assembly transitions from infinity focus to close focus, the astigmatism decreases for both of the first and second anamorphic lens components, which allows for proper focusing at close focus (when the object is close to the lens assembly). The astigmatism of the first anamorphic lens component may be equal and opposite to the astigmatism of the second anamorphic lens component, such that the astigmatisms of the anamorphic lens components cancel out one another.

Abstract: Anamorphic lens assembly having first and second anamorphic lens components, each having an astigmatism at infinity focus that is greater than an astigmatism at close focus. As the anamorphic lens assembly transitions from infinity focus to close focus, the astigmatism decreases for both of the first and second anamorphic lens components, which allows for proper focusing at close focus (when the object is close to the lens assembly). The astigmatism of the first anamorphic lens component may be equal and opposite to the astigmatism of the second anamorphic lens component, such that the astigmatisms of the anamorphic lens components cancel out one another.

Abstract: A focal reducer for use with a camera and a primary lens moves the image formed by the primary lens farther back within the lens/reducer/camera assembly so that the image of an object within the field of view is formed at the image plane of the camera. Relaying the image from the image plane of the primary lens to the image plane of the camera enables the primary lens and the camera, which have the same type of mount, to be used with a focal reducer. Previously, a primary lens and a camera having the same type of mount could not be used with a focal reducer, because the focal reducer interposed between the primary lens and the camera caused the image plane of the primary lens to be located in front of the image plane of the camera, making it impossible for the lens/reducer/camera assembly to achieve infinity focus.

Abstract: Anamorphic lens assembly having first and second anamorphic lens components, each having an astigmatism at infinity focus that is greater than an astigmatism at close focus. As the anamorphic lens assembly transitions from infinity focus to close focus, the astigmatism decreases for both of the first and second anamorphic lens components, which allows for proper focusing at close focus (when the object is close to the lens assembly). The astigmatism of the first anamorphic lens component may be equal and opposite to the astigmatism of the second anamorphic lens component, such that the astigmatisms of the anamorphic lens components cancel out one another.