SMC 135/2.5 has excellent resolution stopped down beyond f/4 but despite (or maybe due to) that it displays visible chromatic aberrations. Perhaps these will go away from the smaller format, I haven't done any measurements. No experience with FA 135/2.8. Just remember the K only focuses down to 1.5 m and is quite heavy (650g). Oh yes, and it's a joy just to hold it. Servus, Alin
Shel wrote: SB> Do you think the K135/2.5 is a better lens than the FA135/2.8? In what SB> way? Have you compared them?