Quote:
Originally Posted by Wavytone
ED elements have to be solid lanthanum glass to be effective - coating is pointless.
And hence the price of the LHD series. Ditto TV Panoptics which also use it, and FWIW the Vixen LVW42 which is huge lump of glass.
|
Well, coating isn't pointless, but it isn't lanthanum glass, either.
I'm sure these are broadband anti-reflection coating (BBAR)
For coatings to be effective, they do have to match the refractive index of the glass, however.