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i: Changing the ISO Speedt
* High ISO speeds will result in grainier images.
ISO Speed Guide
ISO Speed
Shooting Situation
(No flash)
Flash Range
ISO 100 - ISO 400 Sunny outdoors
The higher the ISO speed,
the farther the flash range
will extend.
ISO 400 - ISO 1600
Overcast skies or
evening time
ISO 1600 - ISO 12800, H
Dark indoors or night
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.289).
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.
If you use a high ISO speed and flash to shoot a close subject, overexposure
may result.
With ISO 12800 or “H” (equivalent to ISO 25600), the number of possible
shots/maximum burst for continuous shooting will greatly decrease.
As “H” (equivalent to ISO 25600) is an expanded ISO speed setting, noise
(such as dots of light and banding) and irregular colors will be more
noticeable, and the resolution will be lower than usual.
As the maximum ISO speed that can be set differs between still photo
shooting and movie shooting (manual exposure), the ISO speed you set may
change when you switch from still photo shooting to movie shooting. Even if
you switch back to still photo shooting, the ISO speed will not revert to the
original setting. The maximum ISO speed that can be set varies depending on
the setting for [2: ISO expansion] under [54: Custom Functions (C.Fn)].
• When [0: Off] is set: If you set ISO 12800 during still photo shooting and
then switch to movie shooting, the ISO speed will be changed to ISO 6400.
• When [1: On] is set: If you set ISO 12800 or “H” (equivalent to ISO 25600)
during still photo shooting and then switch to movie shooting, the ISO speed
will be changed to “H” (equivalent to ISO 12800).
Under [54: Custom Functions (C.Fn)], if [2: ISO expansion] is set to [1:
On], “H” (equivalent to ISO 25600) can also be set (p.288).
Even if a low ISO speed is set, noise may be noticeable in the LCD monitor
image under low light. However, when you shoot, the image recorded will
have minimal noise. (The image quality of the LCD monitor image is different
from that of the recorded image.)