Testing the Brenizer Method (a.k.a. bokehrama), this one consists of 19 separate images shot at 50mm f/2 (no idea what the final effective focal length and aperture is). After post-processing and cropping, the final result is a 14885x9924 (140MP) file.
Yeah, something like that... very tricky to execute, but if done well can do shallower depth of field than the widest aperture lenses. https://en.wikipedia.org/wiki/Brenizer_Method
You have to lock your exposure, right? Because I read that this method requires or results in different exposures?