i'm still not clear: same lens; same focal lengthe and aperture; same subject, same distance, and same lighting; and ISO 3200; ... if 5D is cropped to same dimensions of final *image* as 40D, which has better image quality ???

sorry. i put my 5D up for auction on ebay. but, after reading this thread, i have cancelled the auction of the 5D. here is my problem: in August, i photographed a wedding and reception. my favorite lens is the 24-105 f/4 L. (i have a 50mm f/1.4, but its AF is useless in low light.) at the...

thank you (please forgive my English.) thank you, Mikael, for your many tests. i have cancelled my order for a 50D. and, i have cancelled my ebay auction of my 50D. i will keep my 40D and wait to see tests of the 5D MkII.