Method for testing and/or adjusting a camera, in particular a digital camera, characterized by the following steps: (a) creating an optical test standard, by (i) producing a preferably plate-like or card-like substrate for the optical test standard such that a plurality of subareas, each having different gray-scale representations, are provided on a surface of the substrate or so as to be at least partially embedded in the substrate, or using such a substrate for the further steps; (ii) capturing at least one reference image of the surface of the substrate, or a reference image when the substrate is irradiated, at least in the region of the subareas, by means of a reference camera, the at least one reference image being captured using a specified setting of the reference camera, which setting includes at least one parameter; (iii) determining reference gray-scale values for the subareas from the reference image and assigning the reference gray-scale values to the substrate; and (iv) assigning the reference gray-scale values to the substrate by applying the data to the substrate in an optically readable form and/or storing the reference gray-scale values in a memory provided in or on the substrate; (b) capturing at least one image of the optical test standard using the camera to be tested and/or adjusted, the at least one image being captured using a specified setting of the camera to be tested and/or adjusted, which setting includes at least one parameter, and determining actual gray-scale values for the subareas from the at least one image; and (c) according to a comparison of the actual gray-scale values with the reference gray-scale values or with a specified value range for permissible actual gray-scale values, drawing a conclusion regarding sufficient or insufficient adjustment of the camera to be tested and/or adjusted. (a) creating an optical test standard, by (i) producing a preferably plate-like or card-like substrate for the optical test standard such that a plurality of subareas, each having different gray-scale representations, are provided on a surface of the substrate or so as to be at least partially embedded in the substrate, or using such a substrate for the further steps; (ii) capturing at least one reference image of the surface of the substrate, or a reference image when the substrate is irradiated, at least in the region of the subareas, by means of a reference camera, the at least one reference image being captured using a specified setting of the reference camera, which setting includes at least one parameter; (iii) determining reference gray-scale values for the subareas from the reference image and assigning the reference gray-scale values to the substrate; and (iv) assigning the reference gray-scale values to the substrate by applying the data to the substrate in an optically readable form and/or storing the reference gray-scale values in a memory provided in or on the substrate; (i) producing a preferably plate-like or card-like substrate for the optical test standard such that a plurality of subareas, each having different gray-scale representations, are provided on a surface of the substrate or so as to be at least partially embedded in the substrate, or using such a substrate for the further steps; (ii) capturing at least one reference image of the surface of the substrate, or a reference image when the substrate is irradiated, at least in the region of the subareas, by means of a reference camera, the at least one reference image being captured using a specified setting of the reference camera, which setting includes at least one parameter; (iii) determining reference gray-scale values for the subareas from the reference image and assigning the reference gray-scale values to the substrate; and (iv) assigning the reference gray-scale values to the substrate by applying the data to the substrate in an optically readable form and/or storing the reference gray-scale values in a memory provided in or on the substrate; (b) capturing at least one image of the optical test standard using the camera to be tested and/or adjusted, the at least one image being captured using a specified setting of the camera to be tested and/or adjusted, which setting includes at least one parameter, and determining actual gray-scale values for the subareas from the at least one image; and (c) according to a comparison of the actual gray-scale values with the reference gray-scale values or with a specified value range for permissible actual gray-scale values, drawing a conclusion regarding sufficient or insufficient adjustment of the camera to be tested and/or adjusted.