I just bought a used Canon 85mm f1.8 lens. It is in excellent condition but I noticed that it is front focusing. I thought instead of trying to do it myself, I'll just call the local camera store that has been in business for over 30 yrs, they would know how to do it. I called, I said "do you do micro adjustments"... pause, she said "micro what?", I said my lens is front focusing, can you adjust my camera for front focusing, she said "front what?"... she had no idea what I meant. I tried to explained what the camera was doing then she said, "what camera do you have, I said I have the 7D, she said, if you push this little button and put it in the middle, that is where you get the best focus, do you want me to explain how the move the little red box in the view finder, etc... Anyway, I started laughing and said never mind. I'll figure it out
I could believe that they had never heard of Back/font focusing.