Is it one with the other?
Here’s my best shot at answering this:
2b (Darker Version) (Hex, RGB)
2b is the darker version. As you can see it has a similar RGB hue to the other two. The differences are most noticeably a subtle, but not entirely noticeable, green tint in the middle from the light version, and a slightly greenish tint on the edge. The green in these samples comes from the filter, not the colors themselves. I also suspect the “Halo” in the center is not a true, single, circular halo at all, but rather two parallel bands of halo-like colorations. Here’s an image I captured comparing the two, and they look very much like each other:
(Note: These are just a handful of images I captured to illustrate the comparison)
HB has a little more of a golden hue, and a slight green tint to it with the “darker” version, but it may be an even lighter halo (as most of them are), or it may be a little darker halo (as you’ll see in the “lighter” version):
How does it work?
As is often the case in filter art, it all boils down to the same question – this is an optical illusion!
The filter contains a lens that creates a slightly tilted refractive index, which bends light coming in. This bending of light occurs because of the lens’ refractive index, or focal length. The smaller the focal length, the more it moves around during the path of the light that enters. The more it moves, the more “jiggles” it creates in its refractive index, the greater its “jiggle” (actually, the effect is “stiffening” of the “stiff” refractive index).
These slight bends make the filter appear “squirmy” or “jiggly” with the light that enters. The filter appears “squirmy” because it doesn’t stop all light (which is what most filters are supposed to do) which means, it bounces off walls and anything else. The resulting “squirmy” effect is what makes these filters seem “jiggly”:
In addition to the prism that bends the light, the filter also contains other elements. These include a film which changes color according to the time the light enters, and a tiny piece of silver, which allows the
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