Canon 50 F1.2L VS 85 F1.2L MKII Lenses

[Viggo]

At what aperture settings is the 50L sharpest?
Thanks.

I ran a test through FoCal software, aperture sharpness test, and it shows the following:

50 L: Way sharper at 1,8 than 1,2 (obviously) but it is also quite a bit sharper at 1,8 than at 2,2. The very sharpest aperture is f5.

(Have no idea if this goes for every copy on every body, but this is a 2012 50 L on a 1d X)

It has the "dreaded shiftfocus", but I never worry about it, even up close, properly calibrated I don't notice shift. What a lens this is though, if you shoot test charts you might feel you overpaid, use it like a workhorse in all weather and shoot wide open and 1,8 and the 50 L will make you VERY happy....

[TheAshleyJones]

Like most people who have replied, I have both and the 85LII is my main lens.  The 50L gets very little use as it sits between the 35 and the 85 which are both amazing and it is less so.  My main reservations relate to its sharpness wide open.  I do a lot of low light stuff and use the 35 and 85 wide open a great deal.

The only thing I would add is that while the 85 is amazing on full frame, I was very disappointed with how ordinary it seemed when I tried it on a 7D and a 60D.