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  1. DOC

    Tamron 200-500mm vs. sigma 170-500mm

    I have tried both lenses. I used the Sigma 170-500 for a short while and later switched to the Tamron 200-500 . In my hands - the Tamron is superior in all parameters . Both are slow , but the Tamron is sharper at the 500 range .The Tamron is lighter and enables hand holding for long...
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