light_pilgrim wrote in post #15283960
I did not consider Zeiss because of MF. My experience tells me, no matter how good the lens optically is, you need to be able to nail the focus consistently, otherwise....what is the point

Your ability to manual focus doesn't make the lens better or worst. As a matter of fact many choose manual focusing for critical situations where you cannot rely on af.
You need a good screen, a lens that allows you to focus smoothly and practice with mf... people did this for many many years.
On topic, I think that it is difficult to choose a best overall 50.
If you are on a budget and need af the 50 1.8
If you you can afford a little more, the canon 1.4
If you are willing to gamble, the sigma 1.4
If you are going to work in low light and need the af, 50L - not only because of the extra aperture but because of the af consistency. You have to learn about focus shift, an inherent problem in the design of this (and many other) lenses.
If you want the best IQ, period, the makro-planar.
I will let the more knowledgeable talk about alternative glass that fits in between this main stream lenses, but the CZ 50 1.7, the zuiko 50 f2, the rokkors are some of the best out there.
So, the best lens depends on your budget, your need for af, auto aperture, aperture, specific type of bokeh, maximum magnification, size and weight, and then some other things like sharpness, microcontrast, resistance to flare, weather sealing, shape of bursting stars, chromatic aberrations, performance wide open vs stopped down, not to mention the body that you shoot with ( crop vs full frame), size of the mirror...
Pick two or three things that are paramount for your need and it will be easier to decide which is the best lens- for you.
I have owned at least 2 copies of the lenses in the poll and recently moved to a ZE... I am now learning AF.