Top of camera controls (left)
Canon has tweaked the controls on the left of the body slightly - the new ISO button by the LCD information panel means the function of the buttons here has been swapped around a little (and simplified). As before there are three buttons which are used in combination with the main dial to make up to six different settings changes. 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).
|Button / combination|
Select exposure mode: *1
|Select AF mode *2
|Select drive mode: *6
• Silent Single Shooting
Continuous H; approx. 5.0 fps
Continuous L; approx. 3.0 fps
10 sec self timer
2 sec self timer
|Select metering mode
Evaluative metering (63 zone)
Partial metering (8.5% of center)
Spot metering (2.4% of center)
Center-weighted average metering
|Select flash exposure
+/-3 EV in 0.3 or 0.5 EV steps
|Select exposure bracketing:
0.3 - 3.0 EV steps (3 frames)
|*1|| C.Fn I-9 allows you to disable any of the exposure modes.|
|*2|| C.Fn III-3 allows you to choose between shutter, release or drive priority AI Servo AF mode|
C.Fn I-7 allows you to lock metering to the currently
selected AF point for Spot metering.
C.Fn I-10 allows you to disable any of the metering modes.
C.Fn I -4 and 5 allow you to change the bracketing sequence
/ auto cancellation rule
C.Fn I-6 can be used to set the number of bracket shots (2, 3, 5, 7)
C.Fn III-16 allows you to reprogram continuous H mode
to 5,4, 3, or 2 fps (1-4 fps in 'L' mode).
Exposure / Focus / Metering / Drive modes
Program AE (Shiftable)
Aperture Priority Auto
|M|| Manual Exposure
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.
Shutter Priority Auto
The Mark III 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.
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