This could be subtitled, 'The things we do when we're bored'.
This is an animated GIF to show the Tilt/Shift functionality of the Nikon PB-4 bellows.
It was for a write up on using various manual focus lenses on modern DSLR's in 'Alternative, Legacy or Manual Focus lenses, an overview'. I didn't end up using this GIF, thought it was a shame not to post or use it.
JJ