Radio frequency interference (RFI) suppression is one of the critical technologies for Synthetic Aperture Radar (SAR) imaging.

射频干扰(RFI)抑制技术是合成孔径雷达(SAR)的关键技术之一。

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It also is critical to maintain the accuracy of the aperture position as close to the computer-generated design as possible.

保持孔位精度跟计算机设计值尽可能接近是关键。

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Offering a fixed 50mm focal length and extra-bright F1.4 aperture, the premium lens is an ideal choice for quality-critical portraiture and low-light shooting.

ENGADGET: Sony NEX-3N and Alpha A58 unveiled, heading to Europe this spring