Multi-lens, multi-camera calibration of Sony Alpha NEX 5 digital cameras

This paper describes close-range calibrations of multiple Sony Alpha NEX 5 consumer digital cameras with multiple interchangeable lenses. The standard physical parameter set and a standard parameter set with affinity and orthogonality terms are tested with both block-invariant and photo-invariant principal point parameters. The impact of the parameter sets is analysed to determine the effectiveness of the inclusion of these parameters in reducing systematic errors. The parameters are analysed to determine if a lens effect or camera effect is being modelled. Some conclusions are drawn regarding the possible physical sources of the systematic errors.