I have recently bought a P3 Professional and I'm not sure if there is a fault with the camera/lens or if I need to modify some settings?

I have attached an image, which I have added a straight line to show the problem. The horizon bends up and down!

Any thoughts please?

Warped horizon

Yes, it is quite normal, you should see what the image looks like before it is corrected in the camera. And it is perfectly consistent with a low cost camera.

Post process using Adobe Lightroom, they even have a lenses correction profiles for DJI cameras to sort this.

that is a pano right?

That looks like it's running very, very early firmware.
When they were first released, the P3 A & P did that but DJI quickly brought out a firmware update that fixed it.
The app will tell you what firmware version you have running - look in the settings for the 3 dots icon and go right to the bottom ofthe page to see which version.

Aerial-Image Posted at 2017-7-16 00:27
Post process using Adobe Lightroom, they even have a lenses correction profiles for DJI cameras to sort this.

This was processed using the Adobe lens profile for DJI!

PandaFlyingcat Posted at 2017-7-16 22:57
that is a pano right?

Nope. Single shot straight out of camera, then colours slightly adjusted in Adobe Camera Raw.

AntonyM Posted at 2018-7-15 03:49
Nope. Single shot straight out of camera, then colours slightly adjusted in Adobe Camera Raw.

And what firmware is the camera using?
See post #5

Labroides Posted at 2018-7-15 04:16
And what firmware is the camera using?
See post #5

I can't check that at the moment as DJI have my controller for battery repairs. But I will post as soon as I get it back.

Sorry for the long delay in replying. The notifications didn't work!