I purchased this lens recently, and although I haven't had much experience with manual focus, all I can say is that the feeling and the quality of this piece of engineering is amazing. I guess practice is a must in trying to get the best out of it, but once you nail focus, the result is outstanding.

I should have bought it 2 years fantastic

the lens quality and the image that it deliver is simlly awesome, so much better than canon l series lenses, it has like a sort of tear drop look something that wanted and desired for so long, now i dont understand why xmon canon fit the u cant declick the apreture like the sony version which is...