Originally posted by reh321 Calibrate your eyes.
I usually know without ‘chimping’ whether I have “nailed” focus.
God is calibrating my eyes but apparently in a wrong way
But even before he decides to start recalibrating, "nail" focusing with the default AF focusing screen is not possible if shoot at 1.2 or 1.4. You can guess, but you can not know for sure if you have nailed focus without looking at the final image.
Of course, we didn't shoot at F 1.2 that often on film cameras --- part of the reasons is we knew we were going to miss a lot
Originally posted by MMVIII 101 points might make something like that quite useful
On Pentax, to do that, we will have to set the camera at AF and use focus confirmation or trapping. It will work, but not as fast and confident.
Canon always provides precision screens for high end cameras, when shooters need fast lenses, for exactly the same reason.