Yosemite game-changer

“Game changer” is most certainly a cliché, but every once in a while I get to use the term without shame. I used it when I switched from film to digital; again when I discovered that the Sony a7R (and now the a7RII) gave me 2- to 3-stops more dynamic range than my Canon 5DIII; one more time when I first turned the Sony…