The photographer must know how to minimize the inherent optical distortion of a very wide Angle lens.

摄影师必须知道如何使很宽的广角镜头固有的光学畸变最小化。

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A camera at the bottom of the lens tracks the viewers by collecting light coming the other way through the lens and the Angle of the LEDs changes to correspond to the viewers' movements.

透镜底部的摄像头通过收集反射回来的光线定位观众的位置，同时发光二极管的角度根据观众的移动发生改变。

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Light enters at the thinner, bottom end of the lens and bounces around until reaching the desired Angle and emerging from the front of the lens.

光线在确定合适角度以后，经透镜底部较薄处折射后从透镜前端发出。

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The high-performance 50mm F2.8 lens has the equivalent angle of view as 75mm on a 35mm lens, and it has been designed exclusively for the SIGMA DP3 Merrill to maximizes the sensor performance.

ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens

Ideal for a variety of scenarios, users can easily leverage the increased viewing angle of the TL34HD's wide-angle lens, especially when shooting landscapes or groups of family or friends.

ENGADGET: Samsung gets official with 14.7MP TL34HD point-and-shoot

"I set up one camera with a wide-angle lens for a wide view of the whole cathedral, and another with a longer lens trained on the centre of the cathedral floor below, " says Lipinski.

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