I’m in the process of selling someone else’s 50mm Leica Summicron-R lens. However, I first decided to test it out on my Panasonic GF1. (I personally own a copy of this lens, but having another to sell inspired me to try it on the digital body.) It’s a 100mm equivalent on the 2x crop of the micro four thirds sensor, but it still renders colors and bokeh as a Leica lens should.
Panasonic GF1 with 50mm Leica Summicron-R, processed in Adobe Lightroom