Not in any way a scientific test, but here are various native and adapted lenses at 5.6 / 125 / iso 800. Auto white balance. Manually focussed on the tuft on my shoe. Photos taken over a 40 minute period from 4pm on an overcast-ish afternoon with boring rugby on the tv. I was full of codeine at the time, so don't give me too much grief, eh. Shot in raw, converted to jpeg in Lightroom. In chronological order: ah, stupid microsoft skydrive. will find different upload Personal observations. Although it cost me the least money (£10), I like the Yashica dx the most. The depth of focus is very cool. The Panasonic 20mm is kind of a funny size (hello plastic bag), but the shoe tuft really jumped into focus as I turned the focus ring. I left shoot w/o lens on for all lenses - don't know if this affects operation of the native ones.