The camera sensor for wedding photography proposal has a number of technical characteristics, which are determined by the set of technologies, solutions and know-how available to the manufacturer, as well as the general technological level at the time of its release. These are the absolute parameters of the bit depth of the image, the number of transmitted tones, and even the sensitivity range. Today, the technological level of development of the closest competitors is such that, within the limits of statistical error, their matrices of cameras produced (developed) at the same time are almost the same. That is, matrices of cameras of the same class will have the same range of sensitivity of the matrix, expressed in the number of steps from minimum to maximum. The difference is only in the approach: Canon, for example, takes matrices with a lower threshold of ISO 100, which have an upper threshold of ISO 6400 – Nikon, on the contrary, chooses matrices that start at ISO 200 – but the sensitivity limit at the maximum will be ISO 12800 at the same stage of development. What to choose, everyone decides for himself. But manufacturers, so that their cameras do not lose to competitors in marketing terms, have found a solution for themselves: they expand the sensitivity programmatically, adding the missing values ​​​​already due to mathematical calculations and processor manipulations. For Nikon, for example, the Lo-1 value corresponds, as a rule, to ISO 100, but not honest, but “sort of ISO 100” – in the picture, the result is almost the same as the standard ISO 200 setting. The situation is the same with the expansion “up”: if the last standard sensor sensitivity value is ISO 6400, then extended Hi-1 will correspond to ISO 12800. For information, you can achieve these values ​​yourself: open the RAW file in the converter and add as many exposure steps as you need – if your camera can’t shoot above ISO 3200, then by adding EV +1 to a shot taken at this sensitivity, you will get Hi-1, in this case, ISO 6400.