Setting ISO Speed (EOS 80D)
Article ID: ART164672 | Date published: 02/22/2016 | Date last updated: 02/22/2016


Setting ISO Speed (EOS 80D)


Icons in this Article
<>: Main Dial / <>: Quick Control Dial / [ ]: Shooting tab 2 / [ ]: Shooting tab 3

ISO Speed Settings

Set the ISO speed (image sensor's sensitivity to light) to suit the ambient light level. In Basic Zone modes, the ISO speed is set automatically.

ISO Speed Guide
ISO SpeedShooting Scene
(No flash)
Flash Range
100 - 400Sunny outdoorsThe higher the ISO speed, the farther the effective flash range will extend.
400 - 1600Overcast skies, or evening time
ISO 1600 - ISO 16000, HDark indoors or night
* High ISO speeds will result in grainier images.

  • If [ : Highlight tone priority] is set to [Enable], ISO 100/125/160 and "H" (equivalent to ISO 25600) cannot be selected.
  • Shooting in high temperatures may result in images that look grainer. Long exposures can also cause irregular colors in the image.
  • When you shoot at high ISO speeds, noise (such as banding and dots of light) 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.
  • As "H" (equivalent to ISO 25600) is an expanded ISO setting, noise (dots of light, banding, etc.) and irregular dots will be more noticeable, and the resolution will be lower compared with the standard setting.
  • If you use a high ISO speed and flash to shoot a close subject, overexposure may result.

  • You can expand the settable ISO speed range up to ISO 25600 (H)-equivalent with [Range for stills/movies] under [ : ISO speed settings].

Changing ISO Speed

1. Set the power switch to <ON>.

2. Press the <ISO> button.

3. While looking at the LCD panel or in the viewfinder, turn the <> or <> dial.
ISO speed can be set within ISO 100 - ISO 16000 in 1/3-stop increments.

"A" indicates ISO Auto. The ISO speed will be set automatically. (Refer to the section below.)
You can press the <INFO.> button to set it to [AUTO].

ISO Speed "A" (AUTO) Setting

If the ISO speed is set to "A", the actual ISO speed setting 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 ModeISO Speed Setting
No FlashWith Flash
ISO 100 - ISO 6400ISO 400*1*2
(Except in the , , < : >, < : > modes.)
ISO 100 - ISO 12800
ISO 100 - ISO 1600
, , , ISO 100 - ISO 16000*1
With bulb exposuresISO 400*1
*1: The actual ISO speed range depends on the [Minimum] and [Maximum] settings set in [Auto range].
*2: If fill-in flash will cause overexposure, ISO speed may be reduced, down to a possible minimum of ISO 100. In < : > and < > modes, if you use bounce flash with an external Speedlite, the ISO speed will be automatically set within ISO 400 - ISO 1600.