[Brightcolours]

 

I feel before I leave this mortal coil, I should own an EF XXmm F/1.0.  Is Canon going to man up, or am I going to have to wait for Sigma or China to come through?

 

Canon's EF 50mm f1.0 L USM had a need of such a big back element that you get pretty funny bokeh disk shapes, the mirror box cuts them off.

Sigma and Zeiis won't come with such a lens most probably, because if f1 already is kind of an issue for the very wide EOS mount, imagine what it is like on all the smaller mounts, like Nikkor's F-mount?

 

I guess your best bet it to try the Canon f0.95 range finder lens on Sony FE cameras or a Canon EF 50mm f1 on Canon FF.

For now, I have settled on two 55mm f1.2 lenses with (too) narrow mounts from the manual focus era (Canon FL 55mm f1.2 and Nikkor-S•C 55mm f1.2).