MTF and resolution can't describe a lens...
you should compare a zeiss contax 50 1,4 to a canon 50 1,4 on a 5D II to see what i mean.
i used to have a RZ, a Rolleiflex, a RB, and two 500CM... sharper lenses where the RB KL and RZ but Zeiss Hassy lens were better for tone values.
Try to find on the net, pics shoot with the Zeiss 28 2 contax "Holywood" to see what i mean !
So, what about my question about the aptus V Orientation ?