| 摘要 |
<p>In a process camera in which variation in required exposure time caused by variation of the photographic conditions such as reproduction scale, diaphragm opening size, and highlight density value, is corrected according to an operational equation when the reciprocity law of the photosensitive material holds good. The present method corrects the reciprocity law failure of the photosensitive material by inserting a correction factor or factors predetermined in the operational equation, thereby determining a proper exposure time. <IMAGE></p> |
