1. An image capture system comprising: a first image capture device for capturing a first image, the first image capture device having a first field of view; a viewpoint assessment sensor having a second field of view; a viewpoint assessment component for determining the location of a user viewpoint using data captured by the viewpoint assessment sensor; and an image modification component, for modifying the first image responsive to the user viewpoint in the second field of view, by reducing the first image to a portion thereof in correspondence with the location of the user viewpoint, wherein the first image is reduced to the portion where boundaries of a user view frustum and boundaries of the first field of view intersect, the user view frustum calculated based on the user viewpoint, the first field of view calculated based on distance information that the first image capture device uses to perform automatic focus when capturing the first.