Canon's latest F1.2 lens is surprisingly fast, shockingly inexpensive

[usonian]

2. Well, did you get one? Oh aren't you an Olympus person?

Just some thoughts.

1. I don't go for high speed lenses. We're not using film any more (well, I do on the side).
You can kick up the ISO a fair amount to gain sharpness from higher shutter speed and not get "grainy" with a good sensor.

2. From the DPR site:

the samples we've taken so far suggest it exhibits quite significant vignetting, as you open the aperture up. The lens also requires the use of distortion correction as part of its design.


Taming these optically (and not just in software) costs money in the design and optics. I don't know how well software "undoes" these defects.

I won't ramble. That must be the reason it's inexpensive.

Ken Rockwell review here: https://www.kenrockwell.com/canon/eos-r/lenses/45mm-f12.htm
In this case, less info is more, I think. Too many charts and graphs.