本期“技术论坛”栏目刊登西北大学公安学院赵公仪老师的“剖析超焦距和景深标尺”一文 ,从原理与技术方面对超焦距进行探讨 ,提出了与有关摄影人士对超焦距的理解和运用过程中的相左意见 This issue of “Technology Forum” published by Zhao Gongyi, a teacher at the Public Security College of Northwest University, published an article entitled “Hyperfocal Distance and Depth of Field Ruler”, discussed the hyperfocal distance in terms of principle and technology, and proposed the understanding and application process of hyperfocal distance with the photographer In the opposite opinion