Panasonic Lumix G 25mm f/1.7 ASPH Lens - Digital Photography Live
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Amazon.com : PANASONIC LUMIX G II Lens, 20MM, F1.7 ASPH, MIRRORLESS Micro Four Thirds, H-H020AK (USA Black) : Compact System Camera Lenses : Electronics
Field review: Panasonic Lumix G 25mm F1.7 ASPH - compact, affordable and capable: Digital Photography Review