Canon EOS R5 C Advanced User Guide PHOTO edition - Page 144

Note ISO speed can also be set in the ISO speed item by pressing the < with an image displayed on the screen. > button Can also be set on the [ISO speed] screen in [ : ISO speed settings]. To expand the available ISO speed range from L (equivalent to ISO 50) to H (equivalent to ISO 102400), adjust [ISO speed range] in [ : ISO speed settings] ( ). Caution Image noise (dots of light or banding) and irregular colors may increase and apparent resolution may decrease at H (equivalent to ISO 102400), because this is an expanded ISO speed. Because L (equivalent to ISO 50) is an expanded ISO speed setting, the dynamic range will be somewhat narrower compared to the standard setting. Setting [ : Highlight tone priority] to [Enable] or [Enhanced] ( ) will prevent you from selecting L (equivalent to ISO 50), ISO 100/125/160, or H (equivalent to ISO 102400). When shooting with a high ISO speed, high temperature, long exposure, or multiple exposure, image noise (graininess, dots of light, banding, etc.), irregular colors, or color shift may become noticeable. When shooting in conditions that produce an extreme amount of noise, such as a combination of high ISO speed, high temperature, and long exposure, images may not be recorded properly. If you use a high ISO speed and flash to shoot a close subject, overexposure may result. 144