Voigtlander 65mm f/2 Aperture Series: Buckeye Tree
See my Sony mirrorless wishlist.
At medium distance, this gives us a good idea of performance wide open at f/2 through f/5.6.
Voigtlander 65mm f/2 Macro APO-Lanthar Aperture Series: Buckeye Tree
Includes images up to full camera resolution from f/2 through f/5.6.