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Old 12-03-2012, 02:03 PM
gregbradley's Avatar
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gregbradley is offline
Join Date: Feb 2006
Location: Sydney
Posts: 17,050
I thought the same thing. I didn't follow how full frame is the conclusion from the lens not working with your APS sized 550D. The larger the sensor the more demanding it is for orthogonality by the square of the increase in size.

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