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[ATM] Aero Ektar Coma Correector?

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Subject: [ATM] Aero Ektar Coma Correector?
From: "M/S Heald" <maheald@octa4.net.au>
Date: Tue, 25 Jan 2005 07:46:24 +0930
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Hello!  I have a 178mm aero ektar that I have to stop down from f2.5 to f5.6
because of coma before getting sharp 4x5 wide field shots.  Is it possible
to design a coma corrector so that I can use it at f4 or f2.5?  Best
regards.

 

Mike

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