No change here, the control structure is identical to the EOS-1D/1Ds/1V. On the left are three buttons which are used in combination with the main dial (just behind the shutter release). These buttons pressed either individually or combined with one other allow you to change the settings of up to six different camera settings. In the icons below the half dial is the main dial (top front of hand grip) and the full dial is the quick command dial (rear).
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| Mode | Description |
| P |
Program AE (Shiftable) *1 |
| Av |
Aperture Priority Auto *2 |
| M | Manual Exposure
*3 In this mode you select the aperture and the shutter speed from any available combination. Main dial (top) selects shutter speed, quick command dial (rear) selects aperture. A half-press of the shutter release will activate the cameras meter and the relative exposure difference (+/- 3 EV) will be indicated on the viewfinder meter (right of the viewfinder screen). A difference of exposure of more than 3 EV is indicated by either an up or down pointing arrow. |
| Tv |
Shutter Priority Auto *4 |
| Bulb | Bulb Exposure The Mark II has a dedicated Bulb exposure mode. In this mode you can select the aperture by rolling the main dial (top) then press and hold the shutter release for the length of exposure you require (normally in conjunction with a remote release). During the exposure the top display gives a readout of the exposure length in hours, minutes and seconds. |
| *1 | P.Fn 10 can be used to retain the program shift for multiple shots |
| *2 | Exposure
steps can be set to 1/3, 1/2 or 1 EV via C.Fn 6. P.Fn 5 allows you to limit the range of available apertures (for all exposure modes). |
| *3 |
P.Fn 3 can be used to select the type of metering mode used in manual
exposure mode. C.Fn 5 can be used to reverse the action of the main / sub dial for selection of aperture and shutter speed. |
| *4 |
Exposure steps can be set to 1/3,
1/2 or 1 EV via C.Fn 6. |
| P.Fn 1 allows you to disable any of the exposure modes. | |
| C.Fn 16 allows you to enable 'safety shift' for Av or Tv modes, when enabled the camera will automatically override the selected aperture or shutter speed to avoid overexposure. |