Okay so,
I had to shoot a few photos for my IGCSE Art's reference pictures so I had another go at detaching my lens (14-42mm) and creating some effects again.
Light refraction in the lens causing different colours of the light spectrum to separate, as different colours of light has different speed, wavelength and frequency (also V = F x λ). Just a quick optics reference... I just found it interesting okay!
Diagram
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Here's a quick diagram for my analogy above! As you can see, light bends because it enters another medium etcetera etcetera.
Another shot
But with a 40-150mm lens without detaching the lens.