The pictures on the still left illustrate bowing of the vertical lines. This occurs when capturing at a extensive angle, which is generally important to display far more of the space.
The pictures on the suitable have been corrected to straighten the bowed vertical strains.
Images shot with fisheye lenses are also distorted and can not be acknowledged.
Brief Suggestion:
If capturing with a zoom lens, try out not to shoot at the widest placing. This can improve bowing.
Write-up Production Tutorials:
Lightroom:
Lens Correction adobe.ly/AmTpjO
Photoshop:
Adaptive Vast Angle Distortion online video listed here: adobe.ly/10e8uWb
and Point of view Cropping video: adobe.ly/XfO3B9