光圈

B Any device such as a shutter, an iris, or a barn-door that is permanently mounted to or intended to be used with a luminaire and is intended to alter the light beam is to be adjusted so the aperture is uniformly reduced in area by 70 percent.

当 光束被调整后，光圈在区域内均减少70%。

Perhaps the most interesting piece was an old box- styled camera, one of the first to use an aperture .

也许最有趣的东西是一个古老的盒式相机，这也是最早使用光圈相机之一。

It is important that you don't adjust your F stop or bracketing while taking your base photos if you can help it.

重要的是，你不调整光圈或包围同时考虑自己的基本的照片，如果你能帮助它。

Its always worth bracketing on these shots and allowing an extra stop to compensate.

因此拍摄的时候你很有必要加一个支架，并用一个额外的光圈来补偿。

Bracketing by several stops is also necessary if haze or clouds interfere on eclipse day.

如果日食天受到了烟或云雾的妨碍，用几种光圈进行包围曝光也是很有必要的

The unsuspecting photographer focuses with the lens wide open to place the circle of least confusion at the sensor position b, and, taking the actual picture at a reduced aperture, he is unaware of the ensuing focus shift that prevents him from getting the best out of the lens.

一个经常使用全孔径来拍摄的摄影师会毫不犹豫地把胶片放在B点，但是如果他不改变胶片的位置，当他使用小光圈的时候，事实上，他就不可能充分利用这个镜头拍到最好的照片了。

Just like the artful loft conversions that overlook the trendier parts of Manhattan or Clerkenwell, the Clubman is adorned with aperture art that's as much about look-at-me drama as ease of use.

光圈艺术在Clubman上的运用带来安逸舒适的体验，如同透过可以远眺曼哈顿或克拉肯威尔繁华街区的顶楼窗口，巧妙绝伦！

Zeiss had become involved in camera lens design and fabrication giving the world such famous names as "Tessar","Biotar" and "Sonnar"(the latter developed by Dr. Ludwig Bertele - another famous name in optics design). In 1926 Carl Zeiss Jena combined five companies including "Contessa" to produce cameras and lenses.

蔡司也涉足照相机镜头设计制造业，并留下了天塞镜头、"Biotar"镜头和大光圈镜头的典范索纳镜头等经典产品（索纳镜头为1931年蔡司另一位著名的光学设计家，路德维希·雅可布·贝尔特勒博士发明）。1926年，蔡司联合5家公司包括"Contessa"公司生产照相机和镜头。

Set your aperture to f/8 (see 4.1) so you have a large depth of field.

将光圈设置成f/8（参见图4-1），就会拥有较大的景深。

It is the distance between the lens diaphragm and the image plane.

即是镜头光圈与影像平面之间的距离。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。