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photography is just amateur radio for the 500nm band

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@gwenprime there is amateur radio in the optical though.;)

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Yes, but only if you're using a flash. Because the two-way communication part is what differentiates Amateur Radio from pure listening.
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@andi

Astronomy is optical DX SWL.
Photography is more local, so pretty similar to urban scanner monitoring. (Street photography is very close!)
😉

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