In an earlier blog, What is Convergence? I discussed how the 17 mm tilt-shift lens eliminates vertical distortion. Let's take the same lens and turn the shift feature to the horizontal position so the lens moves side to side. A wide panorama shot includes more of the subject in the photo than the standard 3:2 ratio you see for normal lenses. This brings more into the composition showing more of the subject and a better composition.
Three photos... left, center and right. The center photo shows the limits of the 17mm.
The editing software seamlessly stitches the 3 photos together for a really wide shot. This takes the 17 mm and renders a panorama as if it were taken with an 8 mm lens without the distortion.
This technique works great for interior shots which includes more detail and adds more to the composition...