That was actually a hack for focus peaking on the original E-M5. Shoot RAW + JPG, focus as desired, throw away the JPG, and the RAW would be nicely focused.I’ve discovered the Key Line filter on my E-M1...
View attachment 244336
w/ E-M1 & 200mm f4 Micro Nikkor
View attachment 247024P1240048 by Walter Kernow, on Flickr
View attachment 247025P1240027 by Walter Kernow, on Flickr
w/ G3 & Oly 60mm f2.8
View attachment 247026P1610143 by Walter Kernow, on Flickr
View attachment 247027P1610132 by Walter Kernow, on Flickr
w/ G3 & 25mm f1.7
View attachment 247028P1610159 by Walter Kernow, on Flickr