I have the XP50 and it has the 4.0 firmware...I run with the image enhancement on all the time. This scope is really a fine piece of equipment and as stated previously, I have used it on 3 different rifles and it was dead on when going back to each rifle's settings. Using regular 30mm rings and just slide the scope off one rifle, slide it on the other, go to that particular rifle set up, test fire for POI and go hunt. Marked all the rails so it goes back in the same spot on each rifle.