Canon EOS-1D X Mark III EOS-1DX Mark III Advanced User Guide - Page 393

AF Microadjustment Adjusting for All Lenses by the Same Amount Adjusting for Individual Lenses Clearing All AF Microadjustments Fine adjustment of the point of focus is possible when autofocusing in viewfinder shooting. Before adjustment, also refer to Precautions for AF Microadjustment and Notes for AF Microadjustment. Caution Normally there is no need to adjust the position of focus. Perform this adjustment only if necessary. Make sure to note that performing this adjustment may prevent accurate focusing from being achieved. Adjusting for All Lenses by the Same Amount Keep adjusting, shooting, and checking the results to set the adjustment amount manually. During AF, regardless of the lens used, the point of focus will always be shifted by the adjustment amount. 1. Select [ : AF Microadjustment]. 393