Canon EOS Rebel T2i EOS REBEL T2i / EOS 550D Instruction Manual - Page 105

3 Lens Peripheral Illumination Correction About the Lens Correction Data The camera already contains lens peripheral illumination correction data for approx. 25 lenses. In step 2, if you select [Enable], the peripheral light correction will be applied automatically for any lens whose correction data has been registered in the camera. With EOS Utility (provided software), you can check which lenses have their correction data registered in the camera. You can also register the correction data for unregistered lenses. For details, see the Software Instruction Manual (CD-ROM) for EOS Utility. For JPEG images already captured, lens peripheral illumination correction cannot be applied. Depending on shooting conditions, noise might appear on the image periphery. When using a non-Canon lens, setting the correction to [Disable] is recommended, even if [Correction data available] is displayed. Lens peripheral light correction is applied even when an Extender is attached. If the correction data for the attached lens has not been registered to the camera, the result will be the same as when the correction is set to [Disable]. The correction amount applied will be slightly lower than the maximum correction amount settable with Digital Photo Professional (provided software). If the lens does not have distance information, the correction amount will be lower. The higher the ISO speed, the lower the correction amount will be. 105