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This
Voigtlander 58mm f1.4 Nokton SL II in Nikon AI-s fit Lens - Lenses | Robert White Photographic Ltd
plus this
Nikon F mount Nikkor AI lens to Pentax K mount PK adapter K10D K200D K-7 K-x K-r | eBay
equals quote from another thread
Quote: Optical adapters exist. These act as short teleconverters, probably around 1.2x. They also degrade image quality a bit, so whatever was special about the lenses is lost.
(
https://www.pentaxforums.com/forums/sold-items/170776-wanted-acquired-nikon-k-mount-adapter.html)
=