Special credits to Dan, Michael, Ben Tay, Vincent, Franics, Thomas, Ernest and myself for the available sonnar lenses for the test.
Special thanks to Kevin for providing the location to gather and shoot.
Shot on M9 on tripod, distance about 1m from the subject. All shots were taken wide-open. Please see below sonnar shots by the different lenses available at least in Singapore.
Total 17 lenses with some duplication to check for variations.