Why Canon and Nikon Might Crush the Life out of Sony in the Full Frame Market Place. Blame Engineering and Physics.

I don't know how many people remember all the discussions way back in the mists of the distant past when Canon ABANDONED their long time, FD, bayonet lock lens mount and put all their chips and bets on the new EOS EF lens mount. It was a crazy brave thing to do when they were locked in what was basically a two way sales contest between Canon and Nikon. But do you remember all the white papers and marketing rationales for this cataclysmic change? No? Let me do a refresh...

The old Canon mount was close to the size of the Nikon mount and both worked very well as long as super fast lenses were not required. Remember that back in the mid-century film days an f2.8 lens was a routine and daily user. People generally accepted that lenses performed best at two or three stops down from wide open so speed wasn't the obsession it is today and photographers were happy to get great images at a relatively low cost per lens. Photojournalists and others who worked in low light pushed camera makers to get faster lenses but mostly because having more light pouring into the dimmer DSLR viewfinders meant it would be easier to achieve quicker and more accurate focusing; even if they eventually stopped down to f5.6 to take the photographs.

With Canon and Nikon competing head to head,