On 18/01/2024 03:02, Rich wrote:

Canon and Nikon have incorporated something like these (though far less complex) into their current compact telephotos.

https://phys.org/news/2024-01-large-glass-metalens-images-sun.html

That is very impressive for a solid single piece of glass and so big
compared to the lithography tool used to make it.

--
Martin Brown

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