It was a reasonable discussion. Sometimes the responses to JCO posts
remind me of schoolyard bullies.
Paul
On Apr 16, 2009, at 11:02 AM, Scott Loveless wrote:
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/
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