锥体投影原理与不同焦距镜头成像

Principle of conical projection and imaging by using lenses with different focuses

空间锥体投影的透射几何学巳广泛应用于航空摄影和航空测量上,但应用于普通摄影技术上尚不多见,本文对广角、远摄（长焦距）等镜头的成像区别及其合理应用有较系统的论述,阐明了其基本原理和概念,可以此指导各种镜头的实际应用。

Geometry of spacial conical projection is already widely used in aerial photography and aerotornography, yet uncommonly used in general photography- This paper presents a systematic outline of the geometry of imaging by using wide-angle lens, long distance photography lens (long-focus lens) ,and an explaination of relevant principle and concepts, thus offering directions for practical use of different lenses.