Canon EOS R5 C Advanced User Guide PHOTO edition - Page 207

Digital Lens Optimizer Various aberrations from lens optical characteristics can be corrected, along with diffraction and low-pass filter-induced loss of resolution. If [Correction data not available] or [ ] is displayed by [Digital Lens Optimizer], you can use EOS Utility to add the lens correction data to the camera. For details, refer to the EOS Utility Instruction Manual. Caution Image processing after you shoot takes longer when set to [High] (which causes the access lamp to be illuminated longer). Maximum burst is lower with [High]. Image recording to the card also takes longer. Depending on shooting conditions, noise may be intensified together with the effects of correction. Image edges may also be emphasized. Adjust Picture Style sharpness or set [Digital Lens Optimizer] to [Disable] as needed before shooting. The higher the ISO speed, the lower the amount of correction will be. The effect of Digital Lens Optimizer cannot be checked on the screen at the time of shooting. Note With [Digital Lens Optimizer] set to [Standard] or [High], [Chromatic aberr corr] and [Diffraction correction] are not displayed, but they are both set to [Enable] for shooting. 207