Hello,

The Panasonic Lumix 20mm f/1.7 Aspheric G-Series Lens, a Micro Four Thirds system large-diameter wide-angle f/1.7 20mm (40mm in 35mm camera equivalent) manual focus pancake-style lens. The lens operates a unique manual focus system which drives the focusing group indirectly via the lens's autofocus motor. The feel of the manual focus ring remains the same whether the camera is set to auto or manual focus which can be problematic in some shooting scenarios. The advantage is that turning the manual focus ring quickly makes very fast initial adjustments, but then turning it slowly allows very fine focusing.

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C h u c k C a p r i o l a
B&H Live Chat and E-Mail Sales Manager
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