Experts say a 135mm lens would produce the best, most consistently accurate results. But even then there's an element of risk.

专家们称135毫米的镜头能照出效果最佳最稳定精准的照片，但即便如此也会有失真的风险。

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We should not imagine that with the floating element, we get a high-speed lens with near macro capabilities.

我们不能够想象因为有了浮动元件，我们就有了一个能力巨大的高速镜头。

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A kind of diffraction element modulating phase information by LC space light modulator to get a zoom Fresnel lens, as well as the using of said element to optical imaging system, is introduced.

本文介绍一种以液晶空间光调制器作为调制位相信息的衍射元件，获得可变焦长的菲涅耳透镜，以及该元件在光学成像系统中的应用。

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The 8-megapixel rear camera with auto-focus, five-element lens and 1080p Full HD video recording captures precious moments with crystal clarity, while the front 2-megapixel camera is perfect for face-to-face video chat.

ENGADGET: ASUS Vivo Tab Smart comes to the UK as the ME400, priced at ?399 (update)

It features a 1.2MP front camera for video conferencing and an 8MP rear camera with a large F2.2 aperture, 5-element lens allows for high quality images along with HD video recording.

ENGADGET: ASUS rebrands its tablets 'Transformer Pads,' announces the high-end Infinity Series with either Tegra 3 or Snapdragon's S4 chip

The Transformer Pad Infinity has a 2MP front camera for HD video conferencing along with an 8MP rear camera with a large F2.2 aperture, 5-element lens and LED flash for stunning high quality images or HD video capture.

ENGADGET: ASUS rebrands its tablets 'Transformer Pads,' announces the high-end Infinity Series with either Tegra 3 or Snapdragon's S4 chip