In DAP I examine the behavior of the Canon EF 50mm f/1.2L versus the Canon EF 50/1.4.
Includes HD and Ultra-HD full-frame images lens rendering series, along with crops.
The Canon 50mm f/1.2L is about $1619 and the 50/1.4 is about $399, a rather large difference, so understanding the behavior is a worthwhile effort.
Canon EF 50mm f/1.2L, Canon EF 50mm f/1.4
Wyman Canyon Cabin
Canon 50mm f/1.2L @ f/1.4