>>2576788Dude, most of the reason these were considered dream lenses when they came out was their lack of flare, and the contrast they produce wide open.
Every SLR system had native f/1.2 lenses, but they were hazy, soft focus garbage.
Then Canon bought out boss-dog aspherical lenses, and you could shoot against the light, or with light sources in the frame, and still get something that was not just stupidly sharp, but actually on a printable negative.
Pic related is a straight inversion of a scan with no additional contrast applied from the FD 50L. Admittedly this was at f/2 (I think), not 1.2, but that's still ridonkulous.
>>2576167 is the 85 at f/16, with a massive contrast increase, and the flare barely goes 1/3rd of the way across the frame. In the original scan there's plenty of detail visible below the horizon, even quite close to the sun. 