G: Changing The Iso Speed To Suit The Light - Canon EOS Rebel T6i W Instruction Manual

g: Changing the ISO Speed to Suit the LightK
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 (p.124).
ISO Speed Guide
ISO Speed
ISO 100 - ISO 400
ISO 400 - ISO 1600
ISO 1600 - ISO 12800, H
* High ISO speeds will result in grainier images.
Under [54: Custom Functions (C.Fn)], if [2: ISO expansion] is set to [1:
On], "H" (equivalent to ISO 25600) can also be selected (p.338).
Under [54: Custom Functions (C.Fn)], if [3: Highlight tone priority] is

set to [1: Enable], ISO 100 and "H" (equivalent to ISO 25600) cannot be
selected (p.339).
Shooting in high temperatures may result in images that look grainier.

Long exposures can also cause irregular colors in the image.
122
Press the <g> button
1
Set the ISO speed.
2
While looking in the viewfinder or at

the LCD monitor, press the <Y>
<Z> keys or turn the <6> dial to
select the desired ISO speed, then
press <0>.
 Select [AUTO] to set the ISO speed
automatically (p.124).
Shooting Situation
(No flash)
Sunny outdoors
Overcast skies or evening time
Dark indoors or night
(9)
Flash Range
The higher the ISO
speed, the farther the
flash range will extend
(p.166).
.