Leica M body + Pentax Auto 110 lens
Unfortunately the flange focal depth doesn't allow conversion.
Unfortunatley, the Pentax 110 system - despite being an SLR - have only a 27mm flange focal depth, while the Leica M has 27.8mm, making conversion impossible. :(
Despite this, it's really fun to experiment with them, because the 110 lenses are among the smallest ones ever made. In our experience the 2.8/50 portrait version can be used even with a fullframe sensor (with considerable vignetting), the 18 and 24 mm ones can almost cover the APS-C sensor. All of them seemed to project a very sharp image.
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