Setting the ISO Speed (EOS 5DS / EOS 5DS R)

Set the ISO speed (image sensor’s sensitivity to light) to suit the ambient light level.

In [ ] mode, the ISO speed is set automatically.

Setting the ISO Speed

1. Set the camera's power switch to [ON].

2. Set the Mode Dial to [ P / Tv / Av / M / B ].

3. Press the [ ・ISO ] button.

4. While looking at the LCD panel or the viewfinder, turn the [ ] dial to set the ISO speed.

Overview of ISO speed settings

Caution

Caution

As H (equivalent to ISO 12800) is expanded ISO speed settings, noise (dots of light, banding, etc.) and irregular colors will be more noticeable, and the resolution lower than usual

As L (equivalent to ISO 50) is an expanded ISO speed setting, the dynamic range will be somewhat narrower than usual.

If [ : Highlight tone priority] is set to [Enable], L (equivalent to ISO 50), ISO 100/125/160, and H (equivalent to ISO 12800) cannot be selected.

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.

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.

Caution

Under [ : ISO speed settings], you can use [ISO speed range] to expand the settable ISO speed range from L (equivalent to ISO 50) to H (equivalent to ISO 12800)

Auto ISO

If the ISO speed is set to "A" (Auto), the actual ISO speed to be set will be displayed when you press the shutter button halfway.

As indicated below, the ISO speed will be set automatically to suit the shooting mode.

Shooting Mode	ISO Speed Setting
	No Flash	With Flash
	ISO 100 - 3200	ISO 100 - 1600
P / Tv / Av / M	ISO 100 - 6400*1	ISO 400*1*2*3
B	ISO 400*1

*1: The actual ISO speed range depends on the [Minimum] and [Maximum] settings set in [Auto ISO range].

*2: If fill flash will cause overexposure, ISO speed may be reduced, down to a possible minimum of ISO 100 (except in the [M] and [B] modes).

*3: In the [P] mode, if the external Speedlite is set for bounce flash, ISO 400 - ISO 1600 will be set automatically.