---- Graydon <[email protected]> wrote: 
> On Thu, Apr 16, 2009 at 09:24:54AM +0100, mike wilson scripsit:
> > ---- Scott Loveless <[email protected]> wrote: 
> [on comparing 50mm lenses]
> > > My money's on the M50/2.  Wouldn't that be a bitch if it were true?
> > 
> > Hmmmm.  High build quality verus computerated optical design.  Old but
> > high QC versus new and unknown.  Really hard to call on that one, even
> > before we start wittering about stuff like bokeh.  Think I'll go buy a
> > lottery ticket.
> 
> The DA coatings are better than the FA coatings; I'd be more than a
> little surprised if the FA coatings weren't better than the M coatings.
> 
> Can't leave that out.

IIRC, K and M coatings increase transmission from 96% to 99.8% per interface, 
or something in that order.  Not much space there for improvement, although 
there may be a bit of wriggle room on colour rendition.

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