Automatic hand-held photographic light meters

摘要: Hand-held photographic light meters which may be of either the incident or spot variety are equipped with means transmitting intensity measured to a suitably automatic camera by modulated beam infra-red radiation. In this way is set accurately regardless reflectance subject. Continuous flash mixture two lights used. The has modified receive radiation in Type A invention while B special receiving unit mounts on hot-shoe used give less flexible performance. More than one simultaneously and most features retained.