I was very much looking forward to this, shooting with a 60 year old lens. My Dad gave me a vintage 90mm Leica Summicron F/2 for Christmas (thanks, Dad, for the awesome present). The beauty of the Leica M system is that you can attach any lens from the Leica (M)esssucher (=rangefinder) system introduced back in 1954 to modern Leica digital cameras with an M-Mount. And as I have acquired a (for digital camera standards also vintage) used Leica M (Type 240) about a year ago, the 90mm is a great addition to my small collection of Leica prime lenses.