85mm f/1.2L II USM - Brilliant Lens...

It's sure a very very nice lens but a very "specific purpose" lens too, I love mine and it's my "default" portrait lens paired with the 135 F2.0 L.

I found my copy focuses very consistently on all my cameras (1DS3, 1DS2, & 1D2), it was pretty bad on my old 5D2 unless I am using the center focus point only, but this problem is now gone as I got rid of that 5D2, all my camera is always in AI-Servo mode 100% of the time, I separated the AF and shutter release and only use the back AF button for focus and shutter button only for triggering the shutter,this way I can jump in and out between AI-servo focus and single focus with the control of my thumb, all I need to do is let go my thumb after I focused and I am in single focus mode if I even need to recompose, and if I keep my thumb on the button, I am in AI-Servo for tracking moving objects, and my index finger is always on the shutter button, this way if I need to use any manual focus over ride on this particular lens it's real easy, I have been shooting this way for like 20 years, works very well for me, but I found I hardly need to do any manual focus over ride on this lens, may be that's because I don't normally use center point focus and recompose, ( except back then with my 5D2 it's totally opposite I only used the center point), and all the 1D and D3 series camera I have/had does nice job with most of its inner and outer focusing point, so my keeper rate from this lens  (as far as the focus accuracy is concerned) is really high.

I have never use protection filter on this lens from day one, but my lens hood is pretty much permanently on the lens, it's been about 5 year I have this lens, some times I am forced to use the 3 stop ND just to cut down the light so I can shoot wide open during the day when it's too much light, but even with the 3 stop ND on, AF still no affected, I guess it's because still a lot of light for the camera to work with.

Over all I am really happy with the lens, but I do have a few "improvement wishes", I wish it's not "focus by wire" design and it has a nice manual focus ring/mechanism like my Zeiss 135 APO, I wish it Auto focuses a little bit faster. I have no problem doing MF which is what I do with all my Zeiss lenses all these years and now the 135 APO but again if I am using a AF lens then I wish it can focus really fast, again i am not complaining but just a 'wish" as it works fine for me as is now. With that being said, I am not letting my 85L II go anytime soon.