Archived posting to the Leica Users Group, 1997/09/23

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Subject: Re: Filters/APO 280 for sale
From: Leikon35@aol.com
Date: Wed, 24 Sep 1997 00:45:32 -0400 (EDT)

   The filter that came with my 280/2.8 APO is designated as 
  112mm Clear.  It wasnt needed for UV but merely protection
  as the lens cost $8000. I bought a 2nd filter, just in case &
  I still have it (new in the box) although I no longer have the
  lens.  Anyone that has a need for it, please contact me by
  private email.  The new 400/2.8 APO is even larger in dia.
  but it uses only 5.5mm filters in a drawer in the rear, same 
  as the mirror lenses do.

  *************************Marvin Moss*************************
in a message dated 97-09-24 00:21:09 EDT, you write:
<< 
 >>As Leica said a number
 >>of years ago "If we had wanted a piece of glass in front of our lenses, we
 >>would have designed it there. But we don't and we didn't."
 
 >Actually, they did. The 280 2.8 Apo Telyt came with a UV filter, and the
 >instructions said that there is no degradation of image quality except in
 >strong backlighting situations, where they recommended it be removed.
 >
 >Eric Welch
 
 Right! You just proved my point. The lens was was designed for use with the
 filter and the filter was designed for use with the lens. By Leica (Lietz
 then I think.) However, there was no 280 Apo when Walter said those words
 to me.
 
 Jim