Set-up

Among the main precautions to be taken, the cleanliness of the sensor requires a lot of attention, especially if changing objectives very often. Moreover, the type of mounting may need to be changed, because some camera bodies may be equipped with a mounting converter (F or C, or even CS) whose positioning distances between optical components and sensor may be different. The sensor and the way it is used are directly conditioned by the characteristics of the photographic objective used. The aperture of the diaphragm is particularly important: it conditions the depth of field, but also the quantity of light received by the sensor, and thus the exposure time, which either enables the rapid acquisition of the image, or limits this possibility. In the case of a high-speed image acquisition, the limiting factor will always be the flux received by the sensor, and this flux will always depend on the lighting and on the speed of the optical components used, of course without taking the object's optical cooperation into account (Fig. 40).