Yeah, this one. I'll try my 1st gen Summicron-R 50 soon on a X-Pro1. I wonder how you would like the old 90 Cron, it's a wonderful lens, with a different rendering compared to all other short tele-lenses I've used.
Jack, beautiful color in that last set
Philippe, looks like you're putting the 50 cron to good use. Its such a great little lens. Very nice shots.
Michael, very sharp bird shots
Georg, LZ, Manu, thank you for always taking time to comment my pic. Appreciate.
LZ, I love the #2 vertical one. glad you find your 50mm, Yes, it is hard to not like it, is it I have find it's Leica's tradition to always have the best 50mm lens over the period. Non of them ever disappoint me. Try 50lux if you can find one in good price, any version.
Manu, Like the composition!
Roni, the food looks delicious.
TT, The Bokeh is lovely.
Georg, looking forward to seeing your pics with X Pro1 & 50 ron
Manu, thanks. Like your shots from Alcatraz.Makes me want to buy a 28 Elmarit....
Michael, I am looking for a 50 lux but that lens is rare on the second-hand market here.
I have find it's Leica's tradition to always have the best 50mm lens over the period. Non of them ever disappoint me. Try 50lux if you can find one in good price, any version. 
