Tried my new
P4P and was not happy with the image quality. Excellent in the centre but blurry at the edges. Looked at your images and see that you have the same problem. Blurry at the left side.
I returned mine and tried a new one with a slight improvement but not to good to my eyes.
The lens of the camera can be considered to be a wide angle one. Any lens demonstrates loss of image quality at the edges, especially wide angle lenses, including really heavy and really expensive ones. Expectations for a wide angle lens of a drone should be realistic. However, loss of quality at the edges should be symmetrical for a properly manufactured lens. At the same time, one can get an illusion of asymmetrical image quality loss if one side of the subject is more distant from the camera than the other.
Aperture value also matters, closing the aperture increases image quality, while closing it too much causes image resolution loss due to diffraction, "threshold" value after which resolution loss starts for the most of lenses is about 8. Still, the best overall image quality for many lenses can be obtained at aperture values of about 11 (resolution decreases somewhat but edges can be better than at 8, etc).
I have a set of RAW photos and videos of the same static subject shot using
Phantom 4 Pro with different aperture values, it can be downloaded from
here .