lense looses sharpness?

Started Mar 9, 2010 | Discussions thread
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Peter Vit
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lense looses sharpness?
Mar 9, 2010

I have an old Canon 24-70 2.8 L lense. I have noticed lately that the pictures taken by this lense are not as sharp as I am used to. The pictures look "gloomy" and dark. Althought when comparing to other lenses in AV mode, the parameters remain th same (exposure time).

What can be the resaon?

Thanks

Peter

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Canon EOS 5D Mark III
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