1.
short focal length (high aperture) lens
短焦距(大孔径)透镜
2.
a photographic lens with a short focal length used to take pictures at short ranges.
带有短焦距在小范围内照相的照相机镜头。
3.
consists of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length.
由许多小镜头排列以制成大直径短焦距的轻型镜头。
4.
Spot diameters of just a few thousands of an inch can readily be attained with convenient short focal length lenses.
用普通的短焦距透镜不难得到直径只有几十微米的光点。
5.
Of, having, or being a camera lens with a relatively short focal length that permits an angle of view wider than approximately70=.
广角的照像机镜头的，有或作为照像机镜头的，这种镜头带有可使视角宽于约70度的短焦距
6.
A near-sighted eye has a shorter focus than a normal eye.
近视眼比正常的眼睛有较短的焦距。
7.
Having three focal lengths.
三焦距的有三个焦距的
8.
equivalent focal length
当量焦距，等效焦距
9.
Focus-to-film distance(f.f.d)
焦点-胶片距离(焦距)
10.
autofocus zoom lens
自动聚焦变焦距镜头
11.
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
12.
long focus lens
长焦距（望远）镜头
13.
Focal length: The distance between the centre of a lens and its principal focus.
焦距:镜头中心与其主焦点的距离。
14.
short-range electronic distance meter
短距离电磁波测距仪
15.
(of aircraft) short take-off and landing
（指飞机）短距起落
16.
Wide-angle lens: Lens with wide covering power. It has a focal length which is less than the diagonal of the film format with which it is being used.
广角镜头:覆盖范围广阔的镜头.它的焦距长度短于所用菲林格式的对角线长度。
17.
QSTOL (quiet short takeoff and landing)
低噪音短距起落低噪音短距起落飞机
18.
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快速变焦距手术显微镜