Photographer Sasha Vasko wanted to get his Pentax-110 24mm lens on a Panasonic Lumix G1. I am sure you remember the G1, but do you remember the ultra small Pentax 110 series, it was quite popular at the days with a wonderful array of lenses.
By hacking the old lens with a C-mount to Micro 4/3 adapter (going through a 55mm filter stack cap, a faceplate and the lens mount and aperture assembly from the original sacrificed Pentax-110 Auto camera) Sasha created a match.
Here are the images showing the parts Sasha used
And here is the kind of image this camera takes.
DIY Pentax-110 lens to Micro 4/3 adapter [Sasha Vasko]