Wow, I didn’t know these existed, but they do!

Canon supposedly made f0.95 lenses in the 60’s and Leica has one too:

http://www.smh.com.au/news/digital-life/cameras–camcorders/articles/leica-lens-matches-aperture-record/2008/09/19/1221331172762.html

(at 10k a pop and ISO 25k I couldn’t care less - - - - although that Bokeh must be SWEET!!!  Drool….