A couple of months ago I finally pulled the trigger and bought the Canon EOS R mirrorless, and I do love it immensely, but it’s missing a feature that Canon introduced after it shipped on their 2nd full-frame Mirrorless — their entry-level Canon EOS RP, and that is Focus Stacking (or as they call it, “Focus Bracketing.” Essentially, the camera automatically takes a series of shots each one focused a little farther into the image. This is awesome for shooting…