Originally posted by Todd Adamson Is this true? I'm not saying it isn't and I'm not very educated about this. I recall Nikon had some fancy new "nanocoat" a couple of years ago, but I don't know if it was a real advance or not. Have Pentax (or other manufacturers) really made significant advances in coatings over the last decade?
For a view from the dark side, see
Canon : Canon Technology | Canon Science Lab | Lens Coatings
"SWC (Subwavelength Structure Coating), developed by Canon, is a new type of technology that uses aluminum oxide (Al2O3) as the structural material of the coating in order to align countless wedge-shaped nanostructures only 220 nm high, which is smaller than the wavelength of visible light, on a lens surface. This nano-scale coating provides a smooth transition between the refractive indexes of glass and air, successfully eliminating the boundary between substantially different refractive indexes. Reflected light can be limited to around 0.05%. Furthermore, it has displayed excellent reflection-prevention properties not seen in conventional coating even for light with a particularly large angle of incidence. Currently, SWC is being used in a broad range of lenses, not only wide angle lenses, which have a large curvature factor, but also large-diameter super telephoto lenses, greatly reducing the occurrence of flare and ghosting caused by reflected light near the peripheral area, which had been difficult in the past."
or
us.
leica-camera.com/assets/file/download.php?filename=file_1742.pdf
"Leica now uses a new technique, developed in cooperation with Leybold: the plasma ion-assisted deposition. (IAD: ion-assisted deposition). With this technique the heating and cooling stages are no longer necessary and the growth of the coating layer is not pillarlike but amorphous, producing a smoother surface. The technique basically consists of bombarding the target, which consists of the coating material, with argon ions, setting free atoms that are deposited on the substrate to form the coating."