How does the 75 compare to the famous Summicron & Noctilux 50mms? I only ask, as I haven't seen any direct comparison on line, and sample pictures on Flickr & elsewhere don't convince compared to hearing from someone whose actually tried all these lenses. Yes, I am aware that we're talking about different things here; the manually operated Leica lenses will obviously operate differently to the Oly, with its AF etc, but in terms of optical quality at say f4 - would it really be easily apparent from comparing 2 shots with the different lenses, that the Leica lenses will be considerably better? I'm sure that's the case if you're talking about, say, the Oly 17, but the 75? I'd be truly amazed if that was the case, but am more than happy to be corrected. Just curious and very interested to see if anyone lucky enough to try the Leica's can comment. Thanks.