Just a quick one ..... Christopher Frost has reviewed this lens ...... it's pretty much perfect not needing any lens corrections ... just a tickle of flare in direct light .... bokeh balls are nearly perfect to the corners with no sub structure ......
just a case whether you have a need for such a lens for mainly portraiture ...... at around 2.5 K a need will be required !!
[size=small]see here:[/size]
[size=small]https://www.youtube.com/watch?v=OfMHH6p_Cds[/size]