A device for the visual appreciation of the photographic patterns and for the production of the exposure levels needed for the photograph

摘要

P device for the visual appreciation of photographic patterns and for the production of the exposure levels necessary for the photograph. / p & & p & the device, which comprises a primary objective of providing an image of the object, comprises a transformer of the image 5 electronique which converts the image of a primary a secondary image and having a characteristic transformative corresponding to the film with respect to the extent and contrast to the value of gamma, as well as by an apparatus 3 of the attenuation of the light acting on the brightness of the image and having a body of the adjustment 7 indicates the values of the exposure parameters on a scale which is suitably calibrated. / p & & p & application to the photograph. / p