How can multi-element lenses have less scattering than a large mirror telescope? Do they mean smaller diffraction patterns instead?
> 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.