Re: [OM] I'm back

[Chuck Norcutt]

Color correction has been an important part of lens design since long 
before there was color film.  Without color correction the colors of 
light come to focus at different points... chromatic aberration.  It 
affects B&W images as well as color... it's just not so obvious. 
Achromats and even apochromats date from the mid 1700s.  The lens 
technology and color correction were important to visual observation 
through telescopes and binoculars first.
<http://en.wikipedia.org/wiki/Achromatic_lens>

Chuck Norcutt


On 10/25/2011 8:00 AM, Jim Nichols wrote:

>
> What surprised me was that a lens that was designed before color correction
> was envisioned could produce a very pleasing color image.
>
-- 
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