Its kind of a compulsive mental disorder. You start off with one and its great lens but you need something faster so you get another but you dont sell the first cause it has a different character. Then you see a third and you think I wonder how it performs against the other brand you have of the same speed. It has lower contrast better for B&W even though you havent shot B&W for 15 years but you never know you may get back into again one day. Then the 4th comes along but it was so cheap you cant pass it up. Then the 5th one takes the filter size of most of your other lenses you have to get that now dont you? Number 6 is the same vintage of your Classic rangefinder you should have the classic 50mm that matches that now shouldnt you? Jim Bloggs claims that the Russian Sonnar Copy he bought for 15 Bucks is as good as the genuine Zeiss one, no that cant be right better get one to see if hes right. But then you start to question yourself, even ask on your favourite forum if they think your loosing it only to find out that some have twice as many 50's as you have. Solution, start a website showing a comparison of all those 50's for the benfit of all those not sure at what 50mm lens to buy. Its to benefit the people after all its charitable! Someone writes you and asks if you have tried a 50mm lens not listed on your site, hmmm better get that lens so you can give an honest and informative answer after all! "I tell you I am sane your honour, the Noctilux was worth every cent, the kids didnt mind not eating for a few days and getting their christmas presents in January when the sales are on." Thats an unusual jacket your putting on me do you have one with pockets for some 50mm lenses?