高质量影像 宾得20-40mm镜头京东促销

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（中关村在线数码影像行情报道）宾得20-40mm镜头特色在于两倍的变焦范围覆盖了小广角至标准焦段，以及广角端可达F2.8的最大光圈。目前宾得HD DA20-40mmF2.8-4ED Limited ...

(Zhongguancun online digital imaging market reports) Pentax 20-40mm lens features a zoom range two fold coverage of small wide angle to the standard focal length, and maximum aperture wide-angle end of up to F2.8. At present, the Pentax HD DA20-40mmF2.8-4ED Limited...