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  1. postcardcv

    S9gma 150-600 vs canon 100-400

    I had both the 100-400 mkI and the Sigma 150-600 Contemporary for a while. They are both good lenses but in the end I could only keep one of them. I still have the Canon. Personally I would not give up that 100-400 and the 400 f5.6 for the Sigma. Selling my 400 f5.6 is the biggest lens mistake...
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