Ok. found this on DPReview: "Ok..so I updated the firmware on the lens, and I looked into the lens to see that for sure the aperture goes to f/8 when turned off. Now the unsophisticated luddite in me asks. Why the need for this?
I can still remember the intense arguments we all had (albeit before the internet was born) regrading how best to store our manual lenses. One end down, on their side and wide open or stopped down? Engineering comes full circle!Ok. found this on DPReview: "
from a simple engineering perspective mechanical things normally jam at either end of their travel. If the lens is always stopped to minimum it could jam there. Nikon have probably discovered in one of their simulation programs that it can jam after X number of shut downs. Setting it at f8 should do exactly what they say. Improve reliability."
Also..opinion is that in previous firmware: when camera turned off the aperture on the lens was set to minimum, thus possibly exposing sensor to more pinpoint concentration of light if inadvertently left out in sunlight - similar to magnifying glass heating up a paper that it focuses on..