..Straighten in post.  Both Lightroom and Photoshop have easy tools for straightening photos.Here’s how in Photoshop.

In Photoshop, select the Ruler Tool

(I).Locate a line or surface that you think should be horizontal (or vertical).

Click and drag a line to measure the angle.

In the Options bar click the Straighten button….

Source: Crooked Shot? Get it Level