You guys wouldn't be talking about the 'NEW" anti-abrasion, easier to
clean coatings (Armour All) by mistake, would you? In which case they
are new and improved, and reflect light back at you in a different
color than SMC lenses did 5 years ago.
Huh?
On Apr 16, 2009, at 13:34 , JC OConnell wrote:
I never stated that color correction cant be handled
differently with new lenses, of course it can, the point
I was trying to make is that visible color has been
completely corrected in the past without the need for
"new and improved DA coatings". Visible Color correction has
been acheived without them already.
JC O'Connell
[email protected]
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of
DagT
Sent: Thursday, April 16, 2009 4:25 PM
To: Pentax-Discuss Mail List
Subject: Re: DA55* 55/1.4 follow-up
I can´t see why colour couldn´t be handled differently with newer
lenses. Remember that these coatings consist of several layers which
have thickness depending on which wavelength they should reduce the
reflection. This requires fine tuning which has been developed and has
become easier since the 60s. The combination of layer thicknesses may
have been changed, and thus the colour of the transmitted light may
have been corrected as well.
DagT
Joseph McAllister
[email protected]
http://gallery.me.com/jomac
http://web.me.com/jomac/show.me/Blog/Blog.html
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