Setting ISO speed (PowerShot SX40 HS)

Article ID: ART111124 | Date published: 05/11/2015 | Date last updated: 08/17/2015


Raise the [ISO speed] to use a fast shutter speed when you wish to reduce the effects of camera shake or avoid blurry subjects, or to turn the flash off when shooting in a dark area.


  • Lowering the [ISO speed] results in sharper images, but there may be an increased chance of image blurring in certain shooting conditions.
  • Raising the [ISO speed] results in a faster shutter speed, reducing image blurring and letting the flash reach greater distances to the subject. The images, however, will appear coarse.
  • The following explanations are provided based on the assumption that the [Shooting Mode] is set to [Program] ().
  • To set the [ISO Speed], it is necessary to set the [Shooting Mode] to one of the following modes.

- [Custom 1, 2] (, ), [Manual] (), [Aperture Priority] (), [Shutter Speed Priority] (), [Program] (), [Movie Digest] ()

1. Press the <Power> button on the camera.

2. Press the <ISO> () button.

3. The following screen appears on the LCD monitor.

Press the <ISO> () button repeatedly to display the [ISO speed]* you want to set.

The [ISO Speed] you selected is displayed on the screen.

* The appropriate [ISO Speed] differs depending on shooting locations. If the camera shake warning icon () appears when you press the <Shutter Button> halfway, it is recommended to gradually raise the ISO speed in increments such as [ISO 100], [ISO 200], etc., and then set the [ISO Speed] when the camera shake warning icon () disappears.

Guidelines when changing the ISO speed
Automatically adjusts the ISO speed to the Shooting mode and shooting conditions.
 Fine weather conditions, outdoor shooting.
 Cloudy, twilight
 Nightscapes, dark interiors

4. If the following icon is shown, the setting is complete (if setting [ISO Speed] to 400).


  • When the camera is set to [ISO AUTO] (), you can press the shutter button halfway to display the automatically set ISO speed.



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