[dave9t5]

FWIW, panasonic's 20nm PV roughness is not too impressive.  For freeform experiments we like to manufacture our parts to +/- 1.6nm of the ideal surface, which is the limit of what our polishing equipment can do.  The average spherical lens for imaging is polished to between 1/20~1/50 wave for the HeNe laser in the equipment used to measure surface roughness.  That's not to say panasonic's result isn't good - it's a very good surface, but it is not especially good, it is merely better than what most manufactures are producing in the photographic industry.

 

I was wondering how much of that article was marketing...whether Panasonic was comparing themselves to themselves (and just catching up to the rest of the industry) or were actually better than the rest of the photo industry.