Canon EOS-1D X Mark III EOS-1DX Mark III Advanced User Guide - Page 841

AE Microadjustment Caution Normally, this adjustment is not required. Perform this adjustment only if necessary. Note that performing this adjustment may prevent you from obtaining suitable exposure. You can fine-tune the standard exposure level. Effective if images in autoexposure shooting without exposure compensation usually seem underexposed or overexposed. OFF: Disable ON: Enable To access the adjustment screen, select [Enable], then press the < > button. Standard exposure can be adjusted in a range of ±1 stop, in 1/8-stop increments. Set on the positive side if shots tend to be underexposed and on the negative side if they tend to be overexposed. Caution The effective exposure compensation range available in movie recording remains unchanged if you adjust standard exposure with AE Microadjustment, and only the standard exposure level is changed. An exposure compensation amount equivalent to the AE Microadjustment amount is not applied to resulting images if the effective exposure compensation range in movie recording is exceeded (for example, an exposure compensation amount of +1 stop is not applied if AE Microadjustment is set to +1 stop and exposure compensation to +3 stops). Note Exposure compensation can be set up to ±5 stops from the adjusted standard exposure for viewfinder shooting and ±3 stops for Live View shooting. 841