The reason this lens is one I looked at is that many years ago, back in 1974, I had a Leica M3 with the same lens. I had bought it for myself on my 16th birthday. I loved it so much, an amazing thing to own and use. So my "best friend" of 5 years asks me if he could borrow it for the weekend. I said yes. A year later, I get it back, only after writing a letter to his parents since he would not answer calls, etc. When his dad brings it over, the lens on it isn't my lovely 35mm but a crappy 50 mm collapsible. They denied that the lens was different! Nice, eh?