>Anti-reflective coatings work by cutting the unwanted >reflection/scattering/diffusion of light (where it should not go) at each >and any air-to-glass surface. So the coating has to be where it can do its >work, i.e. on each and any air-to-glass surface. Perhaps even between >glasses of different refraction indexes. A filter in front of the whole lens >cannot do that. >Dario
Of course it can. Just not nearly as well or in the same fashion. Not all that the HD coatings does is anti-reflective. I suspect some of it is color-correcting as were the different SMC variations. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
