F-mount with collapsible coupling lever
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F-mount with collapsible coupling lever

Underneath all those dials, the Df is really a modern full frame autofocus SLR (in this shot, it's in live view mode with the mirror flipped up). The Df can accept almost all F-mount Nikkor lenses ever made dating back over 50 years, from old manual focus optics to modern masterpiece zooms. It's the first DSLR with a collapsible-type metering coupling lever, which allows the use of the very oldest non-AI lenses.