A theoretical amendment and interity on the method of ultrafocuses;
超焦距對(duì)焦法的理論修正和完善
This essay gives a detailed mathematical proof of the traits of the depth of the field and ultrafocuses,the factors affecting the depth of the field that is directly showed in other photographic articles.
對(duì)現(xiàn)有攝影文獻(xiàn)直接給出的景深及超焦距的特點(diǎn)和影響景深的因素作出了詳細(xì)的數(shù)學(xué)證明 ,進(jìn)一步探討了這些結(jié)論在攝影技術(shù)中的實(shí)際意義 ,使得景深理論更為充實(shí)和完
The formulas of field depth and hyperfocal distance once appeared in bibilography, but the physical concept as starting point for inference of the formulas is not so clear that it is hard for the others to understand.
景深和超焦距公式曾在文獻(xiàn)中出現(xiàn)過，但推導(dǎo)公式出發(fā)點(diǎn)的物理意義不明確， 難以服人。
Precision measuring system of focus to aerial cameras with CCD;
航空相機(jī)焦距CCD精密測(cè)量系統(tǒng)
New focus measuring method of camera zoom lens;
一種攝像機(jī)變焦鏡頭焦距測(cè)量的新方法
This article introduces the theory and design methods of a zoom lens controller for zooming focus,focussing,and focus feedback in the incorporate zoom lens CCD camera based on 89C2051 microchip and MAX187 A/D switch.
本文介紹了可變焦一體化CCD攝像機(jī)中的一種基于89C2051單片機(jī)和MAX187 A/D轉(zhuǎn)換器的變焦鏡頭控制器進(jìn)行變焦和聚焦控制,以及焦距反饋的原理及實(shí)現(xiàn)方法。
Having three focal lengths.
三焦距的有三個(gè)焦距的
equivalent focal length
當(dāng)量焦距，等效焦距
Focus-to-film distance(f.f.d)
焦點(diǎn)-膠片距離(焦距)
autofocus zoom lens
自動(dòng)聚焦變焦距鏡頭
long focus lens
長焦距（望遠(yuǎn)）鏡頭
Focal length: The distance between the centre of a lens and its principal focus.
焦距:鏡頭中心與其主焦點(diǎn)的距離。
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快速變焦距手術(shù)顯微鏡
Only a bit out of focus.
只是焦距有點(diǎn)不對(duì)。
One must focus the camera before taking a picture.
拍照之前先要對(duì)焦距。
The image is out of focus.
這影像的焦距沒調(diào)好。
Don't forget to focus the lens.
別忘了調(diào)節(jié)鏡頭的焦距。
rear-controlled zoom lens
背面調(diào)整變焦距透鏡
best image plane of zoom lens
變焦距物鏡的最佳像面
image plane displacement of zoom lens
變焦距物鏡像面位移
manual zoom lens
(鏡頭)手控可變焦距透鏡
He focused the camera and took a photo.
他對(duì)好焦距，照了一張相。
Eyeglasses having trifocal lenses.
有三焦距鏡片的眼鏡
the ratio of the focal length to the diameter of a (camera) lens system.
相機(jī)鏡頭直徑焦距比。