Just curious what folks are using to maintain critical focus while shooting. I've used optical viewfinders for years so if I wanted to make an adjustment while shooting I could do it visually. The 5" viewfinder just doesn't seem to work well for this in full frame mode and I recently read here that there will be no 1:1 magnification while shooting. I've found that using my old 4x5 camera loupes helps get close but if I go to magnify mode the image to check focus it is still is not critically sharp. I can shoot wide lenses or stop down to obtain deeper focus but I'd prefer not to have to always shoot at 5.6 or higher. Some shots can be preplanned for follow focus but in spontaneous shooting what are you guys doing when focus is critical?