<p>I agree w/Kenneth as well. There is, & always will be, a market for superfast lenses, but Canon is certainly not interested in producing anything in any mount other than their own. Heck, they've never resurrected/updated their old 50/1 L lens in EOS mount. Even 15 or so years ago, when many of the other Japanese lens makers (e.g., Pentax, Konica, Ricoh, Minolta) were making special edition LTM lenses, Canon chose not to participate.</p>
<p>Nikon is more interested in history, but chose to reproduce some of their own RF cameras & lenses w/the SP 2000 & SP 2005.</p>