Canon EOS 50D Instruction Manual page 64

i: Setting the ISO SpeedN
ISO Speed Guide
ISO Speed
100 - 200
400 - 800
1600 - 3200, H1, H2
If [8C.Fn II -3: Highlight tone priority] is set to [1: Enable], the
settable ISO speed range will be ISO 200 - 3200 (p.177).
Using a high ISO speed or shooting in high-temperature conditions may
result in more grainy images. Long exposures can also cause irregular
colors in the image.
With [8C.Fn I -3: ISO expansion] set to [1: On], "H1" (equivalent to ISO
6400) and "H2" (equivalent to ISO 12800) can also be set (p.174).
About "A" (Auto) ISO Speed
Shooting Mode
1/3/4/5/6/7/
C/d/s/f/8
2
a
With flash
* If fill flash results in overexposure, ISO 100 or a higher ISO will be set.
64
Shooting Situation
(No flash)
Sunny outdoors
Overcast skies, evening
Dark indoors or night
If the ISO speed is set to "A", the actual
ISO speed to be set 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.
ISO 100 - 1600
Fixed at ISO 100
Fixed at ISO 400
Fixed at ISO 400*
Flash Range
The higher the ISO speed,
the farther the flash range
will be (p.108).
ISO Speed Setting