1. A method of assembling an array camera module, comprising: forming at least one hole in at least one carrier; mounting the at least one carrier relative to at least one sensor so that light passing through the at least one hole in the at least one carrier is incident on a plurality of focal planes formed by arrays of pixels on the at least one sensor; independently mounting a plurality of lens barrels to the at least one carrier, so that a lens stack in each lens barrel directs light through the at least one hole in the at least one carrier and focuses the light onto one of the plurality of focal planes; and mounting a module cap over the lens barrels, where the module cap includes at least one opening that admits light into the lens stacks contained within the plurality of lens barrels.