And sure many AF cameras will misjudge your intended focus point-remember "razor thin DOF"-it's a 3 dimensional world out there and if user technique in precisely aiming that center point AF sensor at the exactly the right part of the image isn't spot-on, it's going to disappoint-best practice with this specialty (

At f/1.2 you can get extremely shallow DoF but tack sharp images where you need it the most

The DoF on the 1.2 were simply amazing.

The razor thin depth of field (DOF) makes AF challenging compared to slower aperture optics

Stunning and sharp portraits with wonderful DOF

Superb DOF and great build

but I think that a lot of the people complaining about this lens have a pretty basic misunderstanding of the phrase "RAZOR THIN DOF" which is an inevitable characteristic of a 50mm f/1.2 design

Even at 1.2 and low light, the focusing was fast and the sharp, the bokeh was excellent with the understanding the DOF was shallow (and for close ups, very shallow)

The very shallow DOF makes this lens very difficult to focus if you're using focus-recompose method with the shutter pressed halfway

The speed, shallow DOF, and dreamy bokeh are awesome and the ability to shoot extremely fast and in very low light is amazing

This is the daddy-o grande of normal primes: exceedingly well made, sharp at all apertures, contrasty and a riot of smooth 'n creamy bokeh

: I broke my 50mm f/1.2 finally.

With the other 50mm primes I've owned, I never got filters for them...seemed overkill on cheaper lenses, but with the amount of moolah you fork over for this f/1.2 bad boy, you'll want to protect that forward element!

If you are a casual photographer taking pics of your kids, the f/1.4 will do fine