new lens

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Forum   Open Talk
Subject   new lens  [SIMILAR]
Posted by   Dylan F [PROFILE]
Date/Time   01:01:09, 06 November 2009 (GMT)

I have a Sony a700 with a 18-200mm lens, and I want to extend it to 400mm, but I cannot afford an AF 400mm lens. How much quality would I lose if I used a 2x teleconvertor? I would use it outside, so the loss of 2 f-stops is fine.
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