The pictures on the left illustrate bowing of the vertical traces. This takes place when capturing at a wide angle, which is generally necessary to present extra of the area.
The photographs on the suitable have been corrected to straighten the bowed vertical traces.
Photos shot with fisheye lenses are way too distorted and simply cannot be approved.
Fast Suggestion:
If capturing with a zoom lens, consider not to shoot at the widest location. This can improve bowing.
Post Production Tutorials:
Lightroom:
Lens Correction adobe.ly/AmTpjO
Photoshop:
Adaptive Huge Angle Distortion video clip listed here: adobe.ly/10e8uWb
and Viewpoint Cropping video clip: adobe.ly/XfO3B9