40 to 150 cf 40 to 150

Started Sep 23, 2009 | Discussions thread
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Michaelr205
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40 to 150 cf 40 to 150
Sep 23, 2009

I have a 40-150mm f3.5-4.5. What are the main differences (apart from the obvious) between this and the 40-150mm f4-5.6 and how do they compare for picture quality?

many thanks
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MichaelR

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