I: Changing The Iso Speed To Suit The Light Level - Canon EOS 4000D Instruction Manual

i: Changing the ISO Speed to Suit the Light LevelN
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.92).
ISO Speed Guide
ISO Speed
ISO 100 - ISO 400
ISO 400 - ISO 1600
ISO 1600 - ISO 6400, H
* High ISO speeds will result in grainier images.
Under [53: Custom Functions (C.Fn)], if [2: ISO expansion] is set to
[1: On], "H" (equivalent to ISO 12800) can also be selected (p.258).
Under [53: Custom Functions (C.Fn)], if [6: Highlight tone priority] is

set to [1: Enable], ISO 100 and "H" (equivalent to ISO 12800) cannot be
selected (p.261).
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.
90
Press the <Wi> button.
1
 [ISO speed] will appear.
Set the ISO speed.
2
Press the <Y> <Z> keys or turn the

<6> dial to select the desired ISO
speed, then press <0>.
With [AUTO] selected, the ISO speed

will be set automatically (p.91).
Shooting Situation
(No flash)
Sunny outdoors
Overcast skies or evening time
Dark indoors or night
Flash Range
The higher the ISO
speed, the farther the
flash range will extend
(p.104).