How to remove Lens vignette from photos?

[Ulvåen]

I have some sun issues with some photos i taking with wide angle. Black corners showing up

 

[hawkeye]

I made a copy and applied the lens correction filter, adjusted vignette in the custom tab. In this case I made another copy and applied it a second time, then cleaned up the corners with content aware fill, and some dodge and burn on the lower right corner. Plus a slight curves adjustment. It could be done better it just depends on how much time you want to spend on it.

 

[Ulvåen]

Thanks for the advice

 

[Babine]

Another version using Lens Correction and curves adjustments on duplicates to decrease the darker vignetting.