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That footage linked by Ray was captured from Voyager, a space-craft orbiting, or at least on the way to Saturn. That's a big difference to capturing it from a billion kilometres away, at 10metres focal length.
I agree the Encke gap can and has been captured from Earth - not saying it's not real in this image, but it is not often captured when the rings are still at a reasonably shallow tilt. It's easiest to capture those divisions/gaps when the rings are closer to maximum tilt.
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