Rotating prism mosaic portrait experiment during long exposure

[Brian67]

what happens if you rotate a tiny handheld prism between frames during a long exposure portrait to create a natural color mosaic without any post-processing, and is there a practical recipe to pull it off?

[Isabella5]

Sounds like a cool idea. You’ll end up with a moving rainbow across the portrait and it’s easy to miscolor things; not sure you can pull a clean mosaic without any post-processing.

[PaulQW]

That could look cool, but I doubt you’ll get clean mosaics frame to frame without a bit of post processing.