Canon EOS-1D C EOS 1D X Instruction Manual - Page 128

i: Setting the ISO Speed Set the ISO speed (image sensor's sensitivity to light) to suit the ambient light level. Regarding the ISO speed during movie shooting, see pages 228 and 230. 1 Press the button. (9) 2 Set the ISO speed. While looking at the top LCD panel or in the viewfinder, turn the or dial. ISO speed can be set within ISO 100 - 51200 in 1/3-stop increments. "A" indicates ISO Auto. The ISO speed will be set automatically (p.129). ISO Speed Guide ISO Speed L, 100 - 400 400 - 1600 1600 - 51200, H1, H2 Shooting Situation (No flash) Flash Range Sunny outdoors The higher the ISO Overcast skies or evening time speed, the farther the Dark indoors or night flash range will extend. * Higher ISO speeds will result in grainier images. If [z2: Highlight tone priority] is set to [Enable], you cannot select "L" (equivalent to ISO 50), ISO 100/125/160, "H1" (equivalent to ISO 102400), and "H2" (equivalent to ISO 204800) (p.154). Shooting in high temperatures may result in images that look grainier. Long exposures can also cause irregular colors in the image. When you shoot at high ISO speeds, noise (such as dots of light and banding) may become noticeable. Shooting long exposures at high ISO speeds may result in irregular colors in the image. 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. 128