DC Watch published a detailed hands-on report with sample photos of the new Leica M rangefinder camera adapter for 50mm M42 and Pentax K lenses (translated) – you can add many different lenses to M-mount, like the new TTartisan 100mm f/2.8 2x “bubble bokeh” lens:
New TTartisan 100mm f/2.8 2x “bubble bokeh” macro lens announced
The new adapters are already listed for sale on Amazon Japan for ¥ 22,730 (around $160). International buyers can purchase the adapter on eBay.
Previous coverage:
Just announced: new Leica M rangefinder camera adapter for 50mm M42 and Pentax K lenses
New: Leica M rangefinder camera adapter for 50mm M42 and Pentax K lenses