1) long focal length
长焦距
1.
Optical and mechanical design for long focal length and wide-field optical system;
长焦距大视场光学系统的光机结构设计
2.
This dissertation aims at meeting the needs of designing long focal length space camera.
本文主要研究了长焦距三反射式望远物镜的设计。
2) Long focal
长焦距
1.
The theory of secondary spectrum which exists in long focal-wide bands optical systems is introduced in this paper and the qualifications needed to eliminate are also analyzed.
该系统结构简单、质量轻,可用于小型长焦距望远系统中。
3) long focus
长焦距
1.
Hybrid diffractive-refractive design based on binary optical elements and equiva- lent glasses have been introduced to correct secondary spectrum in long focus and large spectral bandwidth tdescope.
通过采用基于二元光学器件的折衍射混合设计以及等效玻璃的方法,设计了长焦距宽波段望远系统,并对其二级光谱进行校正。
4) focal length
焦距;焦长
5) hyper long focal length
超长焦距
补充资料：变焦距镜头
能在一定范围内改变焦距的摄影镜头。在照相机、电影摄影机或摄像机位置不变时，也能摄下被摄体由远到近或由近到远的画面。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条