I just found out from Mr. Martin Vogt of Arca-Swiss that they manufacture a meta l 4" filter holder for the Arca-Swiss compendium. It accepts up to 4" X 6" filt ers, and allows rotation of the filter if desired. I have been pleased on more than one occasion to speak with Arca-Swiss in Switzerland, finding them to be mo st eager to help answer any questions. I have read elsewhere in this site about concerns regarding customer support from Arca-Swiss, and can only make postive comments regarding my dealings with them. The F-line camera is beautifully buil t and designed. It is MUCH more rigid that the Sinar F-2, which I was able to c ompare side-by-side with the Arca-Swiss at my favorite giant photo store in NYC. Thanks for the great web site, and for the response.

Sincerely, Ken