A feedback and control method of operating an image capture device operable to capture an image of a scene, the device having a visual display, the method comprising: determining values that are representative of each of a plurality of image variables wherein the variables comprise factors that impact on the image luminance of an image to be captured and wherein the plurality of image variables comprises one or more of aperture size, or shutter speed, or sensitivity of an image sensor of the image capture device, in addition to the scene luminance for the scene; representing each of the image variables on the visual display using a display component, wherein a dimension of each display component is proportional to the value that is representative of the corresponding image variable, and wherein the display components representing each of the image variables are arranged contiguously such that when the sum of the values is equal to a pre-defined constant, which corresponds to a target image luminance for the image to be captured, the contiguously arranged display components extend between an origin point on the display and a target end point on the display, wherein each display component comprises a shape shown on the display for which the dimension that is proportional to the value that is representative of the corresponding image variable extends between a first end to a second end of the display component, and wherein the display components are arranged such that the first end of a display component corresponding to one of the image variables is adjacent to the second end of an immediately preceding display component; receiving an input that changes a value that is representative of one of the image variables and consequentially adjusting both the corresponding display component and a corresponding attribute of the image capture device; consequentially adjusting one or more other values that are representative of one or more other variables so that the sum of the values is equal to the pre-defined constant; for each of the values that have been adjusted, adjusting the display component that corresponds to the adjusted image variables; and capturing of an image using the image variables as changed by the receiving of the input. determining values that are representative of each of a plurality of image variables wherein the variables comprise factors that impact on the image luminance of an image to be captured and wherein the plurality of image variables comprises one or more of aperture size, or shutter speed, or sensitivity of an image sensor of the image capture device, in addition to the scene luminance for the scene; representing each of the image variables on the visual display using a display component, wherein a dimension of each display component is proportional to the value that is representative of the corresponding image variable, and wherein the display components representing each of the image variables are arranged contiguously such that when the sum of the values is equal to a pre-defined constant, which corresponds to a target image luminance for the image to be captured, the contiguously arranged display components extend between an origin point on the display and a target end point on the display, wherein each display component comprises a shape shown on the display for which the dimension that is proportional to the value that is representative of the corresponding image variable extends between a first end to a second end of the display component, and wherein the display components are arranged such that the first end of a display component corresponding to one of the image variables is adjacent to the second end of an immediately preceding display component; receiving an input that changes a value that is representative of one of the image variables and consequentially adjusting both the corresponding display component and a corresponding attribute of the image capture device; consequentially adjusting one or more other values that are representative of one or more other variables so that the sum of the values is equal to the pre-defined constant; for each of the values that have been adjusted, adjusting the display component that corresponds to the adjusted image variables; and capturing of an image using the image variables as changed by the receiving of the input.