Bokeh is quite nice and subjects appear in 3D like quality that is wonderful

Super fast, super sharp corner to corner, amazing colors and awesome bokeh

(14) better bokeh, (15) better lens hood that allows for standing the lens on end, (16) electronic aperture, (17) metal filter threads, (18) better dust seals, (19) fluorite coatings on front and rear, (20) better with the TC-14EII, TC-17E11, and the TC-20EIII???????