Hi Chris
I'm using the Schneider APO-Digitar 5,6/180mm with great success: It DOES have the same qualities as my other lenses on the ALPA SWA (and P45+), the Rodenstock 35mm HR, 60mm HR and 100mm HR.
Still, focussing has to be very precise and mind any vibrations...
More information about all the lenses can be found on their homepage:
www.alpa.chGood luck, Jost