Archived posting to the Leica Users Group, 2000/07/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Shel Belinkoff wrote: > > Austin Franklin wrote: > > > One of the advantages of the Heliopan 'Standard Coating' filters, is they > > are SO thin. I do not know if the multi-coated ones are thin also, they > > may be... > > How thin are the Heliopan coatings? B+W coatings are, according to > the B+W catalog I have here, about 1/4 wavelength (and a chart is > shown showing the wavelength in the 400nm - 700nm range). I don't > know what a "nm" is, but since we're discussing wavelengths of light, > I'd imagine it to be very small. > > -- > Shel Belinkoff > mailto:belinkoff@earthlink.net How good is your German?! http://www.heliopan.de/ Mark :-) Rabiner