Wow. this is quite the party, we are pushing Vladimir off the cliff, for a new Summilux Asph. :angel:
I very rarely used the lens for colour - but I do have one roll of Fuji Pro400H buried somewhere, I 'll see if I can find it and if there is anything of interest there.
There's plenty of B&W stuff from the Lux 50 Asph. in my flickr:
http://flickr.com/photos/telenous/tags/summilux50asph/
The films I use (TriX or HP5 pushed one stop) do not do the lens any favours. Delta 100 or TMax 100, Kodachrome 64, or indeed Portra is what you must look at to fully appreciate the sparkle.
I have noticed another member of the forum, John Kuo, is using the lens, both wide open and closed, for
colour, which is what interests you. Check his flickr to see some photos, here (John, I hope you don't mind
🙂 ):
http://flickr.com/photos/johnkuo/tags/5014asph/
John is using almost all the Leica Asphericals, so this is a good place to peruse for photo samples.
It will be interesting to follow the Sonnar and see how it compares with the Lux. Photo samples are far and between for the Sonnar. It will obviously be a fine optic. From the tests between
other lenses in Sean Reid's site, I am increasingly becoming aware that all fine optics have negligible differences in their various aspects of performance - but the cumulative effect of these negligible differences is more than the sum of its parts (in other words, the cumulative effect is
not negligible). You have to study closely both the Sonnar and the Lux to see which one rocks your boat before you commit to buy either - they are both very expensive - don't let some false sense economy tell you that the Sonnar is cheap!
Anyway, let me do some diggin' I may come up with a few photos.
All the best,
