A camera includes a first substrate having a convex refractive element, a second substrate having a concave refractive element, a separation between the first to second substrates, the separation including an air gap between convex refractive element and the concave refractive element, and a third substrate having a detector array thereon, the concave refractive element being closer to the detector than the convex refractive element, at least two of the first to third substrates being secured along a z-axis, wherein the z axis is perpendicular to a plane of the detector array, e.g., at a wafer level. The convex refractive element may include a plurality of convex refractive elements, the concave refractive element may include a plurality of concave refractive elements, and the detector array may include a plurality of detector arrays, each of the plurality forming a plurality of sub-cameras.