Archived posting to the Leica Users Group, 1997/05/24

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Subject: Filters and APO's......
From: ChipZHZ@aol.com
Date: Sat, 24 May 1997 18:22:41 -0400 (EDT)
 
Wondering any hazards of using a circ. polarizer with a 100mm APO?, Any loss
of the APO benefits with a filter?
Also, who makes the best filters: Leica, B+W, Heliopan?  who makes Leica's
anyway?
- -chip