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03-12-2014, 06:00 AM   #16
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Join Date: Apr 2012
Location: Sydney
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My sigma 70-200 HSM II when initially bought couldn't lock on focus , it would get really close to the critical focus and then start hunting around , it used to drive me up the wall. And if i turned focus ring manually to infinity it would sit in limbo. I did experience several occasions where communications was lost from lens to camera , like how you described , i sent it away in october of last year to cr kennedy which took about 6-8 weeks to calibrate it under warranty and sent back , NOW It nails focus everytime . I love this lens. The Bokeh is quite descent as well.

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