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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The "halo cloud" was just an optical illusion caused by sunlight hitting a cloud at just the right Angle.

“光环云”是由阳光以恰到好处的角度触及云层而引起的一种光学错觉。

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And in recent years with the popularity of electronic technology, electronic measuring Angle has gradually replaced the optical measuring Angle.

而近年来随着电子技术的普及，电子式已经逐步取代了光学式测角技术。

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Sharp, Clear 20x Lens: The FinePix F800EXR camera uses the FUJINON 20x Super Wide-Angle optical zoom lens that produces crisp high resolution results throughout the focal range, from 25mm wide-angle to 500mm telephoto, along with a Super Macro Mode that allow sharp focusing down to 5cm delivering the most brilliant detail possible.

ENGADGET: Fujifilm unwraps FinePix F800EXR camera with wireless sharing to Android, iOS

Canon's PowerShot SX260 HS camera delivers a powerful 20x Optical Zoom and 25mm Wide-Angle lens with Optical Image Stabilization delivers stunning images from up close or at a distance and measuring just 1.29-inches thick.

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The OLYMPUS STYLUS VH-515 boasts a 25mm wide-angle, 5x optical zoom (Super Resolution: 16x) in a slim and stylish body, with a rich variety of colors to choose from.

ENGADGET: Olympus expands its point-and-shoot offerings with Stylus VH-410 and VH-515