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Re: [OM] coatings

Subject: Re: [OM] coatings
From: WKato@xxxxxxx
Date: Thu, 1 Oct 1998 10:09:08 EDT
In a message dated 98-10-01 06:33:45 EDT, you write:

<< >No coating can make glass transmit more light.
 
 actually, I believe that they do.  it is not that they make the glass
 transmit more light but that they prevent some of the light from being
 reflected at the surface.  air-glass interfaces are terrible for
 reflections.  coating-glass interface is much better and air-coating
 interface is much better, hence a coated lens transmits more light
 than an uncoated one.
 
 Joseph
  >>
Hmmm, then a multi-coated filter would increase the amount of light reaching
your film over a regular SC filter (but by less than 1 0ifference).

Warren Kato

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