Post

5 followers Follow
0
Avatar

Initial Focus with Terrain mapping Phantom 4 Pro

I've been running into problems with out of focus pictures. I use terrain aware about 70% of the time. I've noticed with terrain aware on, it starts flying to the first point before it starts to initiate focus and when focus is complete it is moving away. Now when terrain aware is off the drone waits for focus success before it flies to the first waypoint. With terrain aware off I get much better results on focus than with terrain aware on. I typically fly at 70meters. 

After each flight I have to pull the sd card out and  look on a laptop to make sure the pictures are in focus. I typically do large multi flight areas so this really slows my production down. I find anywhere about 40% of the flights have to be reflown because they are out of focus with terrain aware on. With Terrain aware off I don't have to redo any flights.

Many of the areas I fly have low contrasting surroundings so I try to take off so the camera can focus on something. 

Rob

Official comment

Avatar

Thank you for the report. We will look into how the autofocus is treated for Terrain Awareness. 

If we can determine the issue we will squeeze it in to our next release. 

Zane

Please sign in to leave a comment.

10 comments

0
Avatar

Zane, I wanted to report back that I had my best/most trouble free flights this week after your latest update. Everything seems to be working great. The focus success occured before it would fly to the first waypoint and it worked great.  I'm flying in a heavy terrain area over 200 acres with a GSD of 2cm. This typically takes 9 to 11 batteries. I have split the area in half. 

Now can you get DJI not to change the firmware.

Rob 0 votes
0
Avatar

Hi Zane,

I have a similar problem. I have flown a few missions and always use Terrain Awareness. When the Phantom 4 (non pro) ascends to the Flight altitude I set, then it is starting to focus and then always prompts "Focus failed". The pictures don't look out of focus so I suppose it might be something firmware related?

George 0 votes
0
Avatar

George,  the P4 (non-pro) has a fixed focus camera so there is no focusing to be done.  Map Pilot should know this and I'm surprised they choose to throw the error that really doesn't exist.

Dave Pitman 0 votes
0
Avatar

No this is wrong, the P4 non-pro (just like pro) has fixed focal length (no zoom) camera. The focus is another thing and inside DJI GO app the focus works like it should. Also in Map Pilot it should work by double tapping the camera view but I haven't test it. My "problem" is that the app reports "focus failed" after reaching the predetermined altitude. I don't know maybe it is false report..

George 0 votes
0
Avatar

If you have adjustable focus, then you must have the Advanced.  The standard phantom 4 has a fixed focus camera.

Dave Pitman 0 votes
0
Avatar

After searching on the internet I suppose you are right. The P4 non-pro has fixed-focus so it must be just a false report of the app.

However I remember tapping in the DJI GO app and focus in different subjects while in the ground. Maybe I don't remember correctly. I will try to check it in the next flight.

Thanks

George 0 votes
0
Avatar

We will address the false reporting of focus failure in a future release. We don't have a P4 to test with anymore so it didn't get tested. Other fixed focus cameras don't throw this error (P3 and X3 cameras). 

Zane 0 votes