Having just looked at the current range of Canon lenses available on the Canon web site. I realised that there are many MkII versions in the range for both EF Zoom and Primes. Several being produced only just recently in the past year.
Considering that the 50mm lens is a very popular focal length and most preferred lens for street photography as well as portrait work and wedding photography, one reason being as the field of vision is close to the human eye on a FF body.
I think it’s about time Canon made a MkII version. It has now been around since August 2006. Although a wonderful lens that produces a beautiful bokeh, Wide Open the Current f/1.2 version suffers from technical issues such as Chromatic Aberration, not that sharp in the corners, strong vignetting etc.
Over the last few years I have upgraded 4 of my L Lenses to MkII versions and I have been amazed of the improvements made to build quality and overall quality of images produced.
If Canon can sort out the issues to the 50mm f/1.2 in a MkII version they will have a real winner that will be very popular.
I hope Canon view this Forum and come up with a long awaited replacement soon.
I will be interested in other members views on this subject.