How can multi-element lenses have less scattering than a large mirror telescope?...

gammarator · 2024-05-16T00:53:44.000000Z

See the third page of https://arxiv.org/abs/1401.5473

formerly_proven · 2024-05-16T07:17:16.000000Z

Though the characterisation of nano-structured coatings isn't quite right

> However, the latest generation of Canon lenses features the first commercialized availability of nano-fabricated coatings with sub-wavelength structure on optical glasses.

Nikon was actually first to market with this, as far as I can tell in the AF-S 300mm f2.8 VR in 2004.