Re: [ATM] Lens after diagonal?

[Michael Lindner <mikell@optonline.net>]

On Wednesday 25 August 2004 07:58 pm, Gary Fuchs wrote:
> Would that be the case even with a good quality lens?
>
> Ken Hunter wrote:
> >The thickness of the glass lens will absorb some of
> >the light and the fact that you are now a REFRACTIVE
> >system will introduce color fringes 

Here I have to disagree with the venerable Ken Hunter. A multicoated lens will 
lose less than 0.25% of the light, (as compared to the diagonal itself, which 
if "standard" coated loses about 10%). As for this being a refractive system, 
if you use an eyepiece to observe, you already have several refractive 
elements in the light path.

Clear skies.
-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net

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