When testing for astigmatism DO NOT use a wide angle EP as it will almost always show astigmatism, which may not be there.
测试像散不能用广角目镜，因为广角目镜本身也有色散。
circular fisheye
超广角镜头，俗称鱼眼镜，观景角度畏为
I think the only thing that it doesn't have is a wide-angled lens.
我想它唯一缺少的是广角镜头，
inverted telephoto lens =retrofocus Iens
广角镜头之一种(扩大后组焦距的设计)
retrofocus lens = inverted telephoto lens
广角镜头之一种，扩大后组焦距的设计
High-quality wide angle lenses are very expensive.
高品质的广角镜头非常昂贵。
On that occasion twelve wide-angle telescopes were set up.
在这一天，他们架起了12座广角望远镜。
Video Lens Design for CCD Camera of Wide-angle Large Aperture
广角大孔径CCD摄像镜头光学设计
S： Yes, some of them include a built-in zoom lens with wide-angle and telephoto settings.
可以，有些自动机具备广角镜及远摄镜功能的内置变焦镜。
Because wide-field lens are adopted in MEE,output images have serious distortion.
由于医用电子内窥镜广泛采用广角物镜，图像存在严重的畸变。
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
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。
Believe it or not, this new digital camera has a wide angle lens.
不管你信不信,这新的数位相机有广角镜头.
Design of Wide Angle Projection Lenses for LCOS Rear-Projection TV Sets with a Large Screen and Compact Structure;
LCOS大屏幕薄型背投电视广角投影物镜的设计
A Digital Calibration Algorithm for Wide-angle Lens Distortion
一种广角镜头光学畸变的数字校正算法
"It is also used as a component of alloys, in phosphors for fluorescent lamps, and in the glasses of certain optical components, such as camera and microscope lenses. "
锗还用作合金组分、萤光灯的磷光粉和作照相机广角镜头和显微镜物镜等光学玻璃组分。
Three New Species of Empididae From Guangxi-Diptera: Brachycera
广西舞虻科三新种记述——双翅目:短角亚目
Objective To discover the mechanisms of keratoconus by observing the ultrastructure of keratoconus with light microscopy and transmission electron microscopy.
目的 观察圆锥角膜在光镜及透射电镜下的超微结构,试图了解圆锥角膜的发病机制。