超焦距

B exceeds, X line, examine before applying at each groups of art, groovy examination and B exceed those who measure line of focal length, directive fixed position is affirmatory. B of C group application exceeds in having method, monitor reach B to exceed interpose of the posture that monitor to discharge stone.

方法将85例肾盂结石患者分为三组，A组29例采取俯卧位，B组28例采取健侧倾斜俯卧位，C组28例采取俯卧位改变健侧倾斜俯卧位，分别在相应体位下进行ESWL术。B超、X线、检验应用于各组术前常规检查及B超测量焦距、指导定位线的确定。C组应用B超进行术中监测及B超监测体位干预排石。

The longitudinal conjugated property of ideal optical system ;2. Starting from the principle of photograph formation by an ideal optical system , this paper derives the formulas of field depth and hyperfocal distance.

本文从理想光具组成像原理出发推导出景深和超焦距的公式，物理思想明确，并结合公式绘出了景深与有关参量的直观图，摄影者容易理解和掌握。

I would use manual focusing to set the lens near its hyperfocal point to maximize depth of field. This will eliminate auto focus delay or hunting, hopefully allowing almost instantaneous shutter release. Do you know if there is a menu that can set the hyperfocal point for you? This would be very useful.

我手动调焦去设置超焦距点附近的透镜取领域的深度最大值，这会除去焦点的延迟或搜索，有希望使瞬间快门线释放~~你知道如果菜单能帮你设定超焦这会非常有用

At the same time, the development of the lens to the series, a few millimeters from the focal length of the fisheye lens to the focal length of 2 meters of super-long telephoto, and with perspective adjustment, zoom away from the emblem, such as night-vision camera lens.

同时，镜头向系列化发展，由焦距几毫米的鱼眼镜头到焦距长达2米的超摄远镜头，并有了透视调整、变焦徽距、夜视等摄影镜头。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。