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Old 1st November 2010, 10:04 PM
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rich rich is offline
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Join Date: Nov 2008
Location: Shebbear, N Devon
Posts: 1,643

I don't think it will, very much. The CFA bends the light rays from parallel to slightly converging. It's those slightly converging rays that strike the front element. The front element is usually slightly convex on the outer face. So the angle of incidence is pretty well the same whether the CFA is almost touching the front element or say 3 inches away.

Best to try it.
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