Old post but let me bump this to the top...
Just want to say thanks for this suggestion... I am by no means an expert on photography etc but this "fix" works for the most part.
I had such a hard time getting the focus down right on my newly bought Mavic Pro. Clearly there IS an issue with my lens mechanism... But I don't want to go through all the hastle of sending it into DJI etc... I bought the drone mainly for sport use rather then photography... I like to fly FPV etc...
So, to get a "mostly" focused video... I flew up 13M, pointed the camera towards the ground and did an auto focus.
The video that comes out is some of the best I have yet to film.
There is NO DOUBT there is something wrong with the lens though as about 1/6th of the video, right side, is blurred even with this method... I can live with this for now though.
Next step is to order 2 lens repair kits off ebay (they are cheap, about 10-15 USD a pop), and do the swap see if it helps.
But yeah, for those that have trouble with getting the focus right on their Mavic Pro:
Launch, fly up 13M, point camera directly at the ground, auto focus, and you should be good to go for the majority of the flight.
Thanks!
EDIT : As you can see, clearly the right side is blurry as.... *Sigh* Made in China baby!