On 4/16/09, Graydon <[email protected]> wrote: > On Thu, Apr 16, 2009 at 10:48:55AM -0400, JC OConnell scripsit: > > NO, I am not saying that "improved" SMC coatings may never give any > > visible flare performance over the original SMC coatings of 1971, but > > it is only going to be visible on really high element count lenses if > > at all, certainly not on prime 50mm lenses in the 5-8 element range > > and only if the transmission percentage is/has significantly improved > > from the 1971 figure of 99.8% which I doubt. > > Every high end binocular manufacturer in the world, including Pentax, > claims a number like that for *system* performance, not single interface > performance. I'd strongly suspect there's another nine in that number > by now. > > There's also that the colour rendition is visibly different between FA > and DA lenses. Something has changed in the colour transmission curves. > Might be the glass, but quite possibly also the coatings.
Would someone please fill Graydon in? -- Scott Loveless Cigarette-free since December 14th, 2008 http://www.twosixteen.com/fivetoedsloth/ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
