11-04-2015, 01:25 PM
I would assume there is touch screen AF in LV, it would probably be sufficient to tap focus at 1/3rd in from the edge of the screen to achieve hyperfocus @7mm AF without all the guess work scenarios for distant scenes.
For my Sigma @ 10mm as the AF at inf. was totally variable I just put a point of paint on the barrel when I had established inf. (non window Pentax version) and focused manually.