Canon EOS-1D Mark IV Review: 8. Operation & Controls: Digital Photography Review

Rear of Camera Controls

No visible changes at the back of the 1D Mark IV compared to the Mark III, so in external control terms, it should be easy enough for existing users to just pick up the camera and start shooting.

Left side of camera rear (above and below LCD monitor / LCD status panel):

Button / mode	Shooting Mode	Play Mode
	Enter / Leave the Menu The camera menu is described on the following pages of this review. Use the Quick Control Dial to move up and down menus and the front dial to move between menu pages. You can also use the multi controller to do the same thing (left-right: menu pages, up-down: menu items).
	Information Displays current camera settings / information - two different modes are available (changed using CF II-9). In Live view mode changes the type and amount of information displayed as an overlay.	Information Press to change the type and level of information shown along with the image.
	Play Displays the last image taken (or the last image on the card).	Exit Play Mode Return to shooting mode. The Mark IV is a shooting priority camera, which means that no matter what is displayed on the rear LCD this will be canceled if any of the camera's photographic functions (example half-pressing the shutter release or AF-ON) are accessed.
	Erase During record review press to erase the displayed image, displays an OK / Cancel dialog.	Erase Press to erase the current image, displays an OK / Cancel dialog.
FUNC.	White Balance, Image Size/Quality Record Func + Media Folder Select Cycles through three pages of commonly used settings (some of which have been moved here due to the loss of dedicated buttons in the redesign of the body).	No function
	Picture Style Displays the Picture Style selection / adjustment screen.	Protect / Voice Memo Displays the Picture Style selection / adjustment screen.

Right side of camera rear:

Button / lever	Operation
	Auto focus start The AF-ON button allows you to trigger auto focus independently of the shutter release 'half-press'. Note that you can re-program the exact function of the AF-ON button via C.Fn IV-1 or you can switch the AF-ON button and AE/AF lock button via C.Fn IV-2 (all custom functions detailed in the menus section of this review).
	Reduce If in single view play mode, pressing this button will switch to a 2x2 thumbnail index, press again for a 3x3 index. If already magnified pressing this button reduces magnification level.
	Enlarge Press to magnify the current image, there are fifteen steps up to a maximum magnification of 10x. Once magnified you can use the multi-controller to move around the image. In Live View mode this button jumps between 1x, 5x and 10x magnifications
	Multi-selector The multi selector has three main uses: Record Mode: Select Focus point (when metering is active) Record Mode: Select Center Focus point by pressing Record Mode (Live View): Select Focus point Play Mode: Scroll around the image in magnified view The Multi-selector is also used to navigate menus.
	Quick Control Dial By default (with the power switch in the third position, one step past ON) the Quick Control Dial can be used to change exposure compensation (steps depend on C.Fn I-1). C.Fn IV-3 allows you to change this to control ISO or AF point selection. It is also used to navigate menus and to change Shutter Speed value in Manual mode (though you can switch the front and rear dials using C.Fn IV-5.
	SET button If Live View is enabled pressing SET enters or leaves live view mode otherwise this button by default has no function in shooting mode, however it can be configured to one of seven different functions via C.Fn IV-4.

Vertical / Portrait hand grip

	The Mark IV has the familiar 1D-series portrait orientation grip. It features a second main control dial, FEL, AF-ON, *, AF point selection and shutter buttons. The function of all of these can be disengaged using the ON/OFF switch on the top of the grip. The grip isn't as deep as the main, landscape format version, risking it being slightly less comfortable to use for extended periods.

Depth-of-field preview

	At the front of the camera beside the lens mount (hand grip side) is the Mark III's depth-of-field preview button. Press this with a small aperture selected (or metered) and the lens will 'stop down' to that aperture allowing you to preview the effective depth of field of the final shot.

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