focal length
Tone colorsmāmámǎmàma
Meanings
1 sense · 5 examplesnoun
focal length
formalA fundamental concept in optics and photography that describes the distance between the optical center of a lens (or the vertex of a parabolic mirror) and its focal point. Determines the field of view and magnification of an optical system.
Zhè这
gè个
jìng镜
tóu头
de的
jiāo焦
jù距
shì是
wǔ5
shí0
háo毫
mǐ米
。
The focal length of this lens is 50 millimeters.
Cháng长
jiāo焦
jù距
jìng镜
tóu头
shì适
hé合
pāi拍
shè摄
yuǎn远
chù处
de的
wù物
tǐ体
。
A telephoto lens with a long focal length is suitable for photographing distant objects.
Show 3 more examplesShow fewer examples
Tiáo调
zhěng整
wàng望
yuǎn远
jìng镜
de的
jiāo焦
jù距
yǐ以
huò获
dé得
qīng清
xī晰
de的
tú图
xiàng像
。
Adjust the telescope's focal length to obtain a clear image.
Jiāo焦
jù距
shì是
xiàng相
jī机
jìng镜
tóu头
zuì最
zhòng重
yào要
de的
cān参
shù数
zhī之
yī一
。
Focal length is one of the most important parameters of a camera lens.
Pāo抛
wù物
miàn面
tiān天
xiàn线
de的
jiāo焦
jù距
xū需
yào要
jīng精
què确
jì计
suàn算
。
The focal length of a parabolic antenna needs to be precisely calculated.