Distortion control data upgradeAnswer ID 17162|Published 02/17/2011 09:51 AM|Updated 05/20/2013 04:26 PMQuestion: What is the “Distortion control data” upgrade, and how do I get it?The Distortion Control Data firmware upgrade is available for Nikon D4, D800E, D90, D7000, D5100, D5000, D3200, and D3100 cameras. This is used to correct barrel and pincushion distortion during shooting and editing. This may be loaded into cameras that support distortion control. For more information please click theĀ link below.