How do I set the ISO Speed (EOS 6D)
27-Nov-2012
8201707200
Solution
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.
ISO Speed Guide
| ISO Speed | Shooting Situation (No flash) | Flash Range |
|---|---|---|
| L, 100 - 400 | Sunny outdoors | The higher the ISO speed, the farther the flash range will be. |
| 400 - 1600 | Overcast skies or evening time | |
| 1600 - 25600, H1, H2 | Dark indoors or night |
IMPORTANT
- If [
:Highlight tone priority ] is set to [Enable], you cannot select ''L'' (equivalent to ISO 50), ISO 100/125/160, ''H1'' (equivalent to ISO 51200), and ''H2'' (equivalent to ISO 102400). - 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.
- When shooting in conditions that produce an extreme amount of noise, such as a combination of high ISO speed, high temperature and long exposure, images may not be recorded properly.
- As H1 (equivalent to ISO 51200) and H2 (equivalent to 102400) are expanded ISO speed settings, noise (dots of light, banding, etc.) and irregular colors will be more noticeable, and the resolution lower than usual.
- If you use a high ISO speed and flash to shoot a close subject, overexposure may result.
- If you shoot a movie when [Maximum: 25600] is set with [ISO speed range] and ISO speed is set to ISO 16000/20000/25600, the ISO speed will switch to ISO 12800 (during movie shooting with manual exposure). Even if you switch back to still photo shooting, the ISO speed will not revert to the original setting.
- If you shoot a movie when L (ISO 50) is set, the ISO speed setting will switch to ISO 100 respectively (during movie shooting with manual exposure).Even if you switch back to still photo shooting, the ISO speed will notrevert to the original setting.
- If you shoot a movie when H1 (ISO 51200)/H2 (ISO102400) is set, the ISO speed setting will switch to H(ISO 25600) respectively (during movie shooting with manual exposure).Even if you switch back to still photo shooting, the ISO speed will not revert to the original setting.
REFERENCE
- Under [
: ISO speed settings ], you can use [ISO speed range] to expand the settable ISO speed range from ISO 50 (L) to ISO 102400 (H2). - [!] can be displayed in the viewfinder when you set an expanded ISO speed (L, H1, or H2).
1. Set the power switch to <ON>.
2. Press the <ISO> button.
3. While looking at the LCD panel or the viewfinder, turn the <Main dial>.
ISO speed can be set within ISO 100 - 25600 in 1/3-stop increments.
[ A ] indicates ISO Auto. The ISO speed will be set automatically. You can also press the <INFO.> button to set it to [ A ] (AUTO) .
About [ A ] (Auto) ISO Speed
If the ISO speed is set to [ A ] (Auto), 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.
| Shooting Mode | ISO Speed Setting |
|---|---|
 | Automatically set within ISO 100 - 12800 |
 | Automatically set within ISO 100 - 1600 |
 | Automatically set within ISO 100 - 25600 |
 /  /  /  | Automatically set within ISO 100 - 25600*1 |
 | ISO 400*1 |
| With flash | ISO 400*1*2*3*4 |
*2: If fill flash will result in overexposure, ISO 100 or a higher ISO will be set.
*3: Except in the
modes.*4:When using bounce flash with an external Speedlite in the
or <> mode, the ISO speed will be set automatically within ISO 400 - 1600.